Which Is Better for Disposable Plastic Juice Cups: PET or PP?
author: Iris
2025-12-08
I. Environmental Impact Comparison
1.1 Environmental Impact during Production
During the raw material production stage, there are significant differences in the environmental footprint of PET and PP. PET production is more energy-intensive. According to research data from the American Chemistry Council, the energy consumption for PET resin production is 70-83 MJ/kg, and carbon emissions reach 2.19-2.733 kg CO2 equivalent/kg. In contrast, the energy consumption of PP production is relatively low, about 1.8 MJ/kg, lower than PET's 2.3 MJ/kg. However, it is worth noting that the carbon emission intensity of PP varies depending on the production process: the loop reactor method is 1.15 tons of CO2 equivalent/ton, the gas phase method is 1.28 tons of CO2 equivalent/ton, and the bulk polymerization method is the lowest at 1.02 tons of CO2 equivalent/ton.
From the perspective of resource consumption, PET production requires a large amount of petroleum resources. Producing 1 ton of polyester (PET fiber) requires approximately 1.5 tons of petroleum, of which purified terephthalic acid (PTA) accounts for 60% and ethylene glycol (EG) accounts for 40%. At the same time, the production of PTA generates approximately 2.5 tons of high-concentration organic wastewater containing acetic acid and terephthalic acid for every ton produced, and the ethylene oxidation stage of EG production releases volatile organic compounds (VOCs), such as acetaldehyde and ethylene oxide. These emissions cause serious pollution to the atmospheric environment and water resources. PP production also relies on petrochemical raw materials. The production of 1 kg of PP generates approximately 1.722 kg of oil equivalent greenhouse gas emissions, and it is estimated that PP production will generate 1.3 billion tons of CO2 emissions by 2025. However, chemical pollution during the PP production process is relatively low, with the main environmental impact concentrated on energy consumption and carbon emissions.
From the perspective of resource consumption, PET production requires a large amount of petroleum resources. Producing 1 ton of polyester (PET fiber) requires approximately 1.5 tons of petroleum, of which purified terephthalic acid (PTA) accounts for 60% and ethylene glycol (EG) accounts for 40%. At the same time, the production of PTA generates approximately 2.5 tons of high-concentration organic wastewater containing acetic acid and terephthalic acid for every ton produced, and the ethylene oxidation stage of EG production releases volatile organic compounds (VOCs), such as acetaldehyde and ethylene oxide. These emissions cause serious pollution to the atmospheric environment and water resources. PP production also relies on petrochemical raw materials. The production of 1 kg of PP generates approximately 1.722 kg of oil equivalent greenhouse gas emissions, and it is estimated that PP production will generate 1.3 billion tons of CO2 emissions by 2025. However, chemical pollution during the PP production process is relatively low, with the main environmental impact concentrated on energy consumption and carbon emissions.
1.2 Environmental Performance During Use
During the use phase, the environmental impact of the two materials is mainly reflected in their lightweight advantages and durability. PET has excellent lightweight properties; a PET container of the same volume weighs about 20% less than a PP container. This means that 20% more goods can be loaded per truck during transportation, significantly reducing carbon emissions during the logistics process. Taking a certain baking company as an example, switching to PET packaging saved over 150,000 yuan in annual logistics costs.
PET has a light transmittance of up to 92%, clearly displaying the color and texture of beverages. This "what you see is what you get" display effect helps to enhance product attractiveness and reduce consumer waste caused by information asymmetry. In contrast, PP is usually translucent or milky white, with a light transmittance generally between 60-80%, making it slightly inferior in terms of product display.
In terms of durability, PP performs better. PP cups can be stored for several years without losing their temperature resistance, greatly improving equipment utilization. PET bottles, however, easily absorb moisture, leading to a decrease in crystallinity and damaging the bottle's temperature resistance, limiting their shelf life to a maximum of 14 days. This characteristic gives PP a significant advantage in dealing with seasonal demand fluctuations.
PET has a light transmittance of up to 92%, clearly displaying the color and texture of beverages. This "what you see is what you get" display effect helps to enhance product attractiveness and reduce consumer waste caused by information asymmetry. In contrast, PP is usually translucent or milky white, with a light transmittance generally between 60-80%, making it slightly inferior in terms of product display.
In terms of durability, PP performs better. PP cups can be stored for several years without losing their temperature resistance, greatly improving equipment utilization. PET bottles, however, easily absorb moisture, leading to a decrease in crystallinity and damaging the bottle's temperature resistance, limiting their shelf life to a maximum of 14 days. This characteristic gives PP a significant advantage in dealing with seasonal demand fluctuations.
1.3 Environmental Impact of Post-Disposal Treatment
The treatment method after disposal is a key aspect in evaluating the environmental friendliness of materials. Both PET and PP are difficult to degrade in the natural environment and are considered "hydrophobic materials," actively repelling water, making degradation reactions difficult. Ordinary PET sheets degrade very slowly in the natural environment, with a biodegradation rate of less than 5% within 180 days. In the natural environment, PP may take hundreds of years to completely decompose.
However, the two materials show significant differences in terms of recycling. According to the latest forecast from the China Materials Recycling Association's Plastics Branch, by 2025, the total amount of recycled waste plastics in China will reach 45 million tons, of which PET plastic recycling will account for approximately 16.5 million tons, representing 36.7%, and continuing to be the largest recycled category. The PET recycling rate in China is expected to reach 45% in 2025, a significant increase from 30% in 2020. From a global perspective, the average global PET bottle recycling rate will reach 58% in 2025, with the recycling rate in China exceeding 65%, higher than Europe's 52% and North America's 48%.
In contrast, PP recycling faces more challenges. Although the global recycled PP market size is expected to exceed 18 million tons in 2025, with China accounting for approximately 35% of the share and domestic recycling volume expected to reach 6.3 million tons, PP still lags behind PET in terms of recycling technology and market acceptance. Especially in food-grade recycling, the technological bottleneck for PP is more pronounced, with a physical recycling loss rate of 18% (the international advanced level is 13%), and the premium product rate of food-grade rPET is only 65% (compared to 85% internationally).
However, the two materials show significant differences in terms of recycling. According to the latest forecast from the China Materials Recycling Association's Plastics Branch, by 2025, the total amount of recycled waste plastics in China will reach 45 million tons, of which PET plastic recycling will account for approximately 16.5 million tons, representing 36.7%, and continuing to be the largest recycled category. The PET recycling rate in China is expected to reach 45% in 2025, a significant increase from 30% in 2020. From a global perspective, the average global PET bottle recycling rate will reach 58% in 2025, with the recycling rate in China exceeding 65%, higher than Europe's 52% and North America's 48%.
In contrast, PP recycling faces more challenges. Although the global recycled PP market size is expected to exceed 18 million tons in 2025, with China accounting for approximately 35% of the share and domestic recycling volume expected to reach 6.3 million tons, PP still lags behind PET in terms of recycling technology and market acceptance. Especially in food-grade recycling, the technological bottleneck for PP is more pronounced, with a physical recycling loss rate of 18% (the international advanced level is 13%), and the premium product rate of food-grade rPET is only 65% (compared to 85% internationally).
1.4 Policy Support and Technological Development
The policy environment plays a crucial role in promoting the environmentally friendly development of materials. In 2025, China released a series of national standards for "Guidelines for the Design of Recyclable Plastics," including GB/T 46020.1-2025 (PET materials) and GB/T 46020.2-2025 (HDPE materials), which will officially come into effect on February 1, 2026. The "Action Plan for Plastic Pollution Control" clearly requires that by 2025, the recycled content of PET bottles should be no less than 30%, which will create a high-end demand of 2 million tons.
At the international level, the EU's policies are even stricter. The EU's Packaging and Packaging Waste Regulation (PPWR) stipulates that from 2025, the recycled content in PET bottles must reach 25%, increasing to 30% by 2030. These policy requirements provide a strong market driving force for PET recycling. It is worth noting that the environmental benefits of recycled PET have been fully validated. According to life cycle assessment studies, recycled PET filaments have a smaller environmental impact compared to virgin PET filaments. Carbon emissions from recycled PET production are approximately 30%-50% of those from virgin PET, and water consumption is 15%-25% of that of virgin PET. Each ton of recycled PET can reduce CO2 emissions by 32.09 kg and SO2 emissions by 0.37 kg.
At the international level, the EU's policies are even stricter. The EU's Packaging and Packaging Waste Regulation (PPWR) stipulates that from 2025, the recycled content in PET bottles must reach 25%, increasing to 30% by 2030. These policy requirements provide a strong market driving force for PET recycling. It is worth noting that the environmental benefits of recycled PET have been fully validated. According to life cycle assessment studies, recycled PET filaments have a smaller environmental impact compared to virgin PET filaments. Carbon emissions from recycled PET production are approximately 30%-50% of those from virgin PET, and water consumption is 15%-25% of that of virgin PET. Each ton of recycled PET can reduce CO2 emissions by 32.09 kg and SO2 emissions by 0.37 kg.
II. Cost Comparison Analysis
2.1 Raw Material Costs
Raw material price is the primary factor affecting product cost. According to market data from 2025, the price of virgin PET is 7500-9500 RMB/ton, while the price of virgin PP is 7800-9200 RMB/ton, and the price of recycled PP is 4000-6000 RMB/ton. On the surface, the price of PP is slightly lower than that of PET, but this price difference is narrowing. In April 2025, the spot price of PET in East and South China remained in the range of 6300-6400 RMB/ton, an increase of approximately 2.5% compared to the beginning of the year.
From a cost-effectiveness perspective, PP is 10-30% cheaper than PET. However, it should be noted that since the density of PET (1.35 g/cc) is higher than that of PP (0.910 g/cc), PET is heavier at the same volume, and the actual material cost difference will be further reduced. For example, in stretch blow molding applications, the price of transparent PP copolymer is approximately 56 cents/pound, while PET is 63 cents/pound, but considering the density difference, an OPP bottle of the same volume is 40% cheaper than a PET bottle.
The use of recycled materials can significantly reduce costs. The price of recycled plastic accounts for 80% of the cost of recycled granules. Taking PET as an example, a 200 RMB increase in the purchase price of waste bottles per ton leads to a 300 RMB/ton increase in the price of recycled granules. However, the quality of recycled materials varies, especially in food-grade applications, where the purity and safety requirements for recycled materials are extremely high, which limits the large-scale application of recycled materials.
From a cost-effectiveness perspective, PP is 10-30% cheaper than PET. However, it should be noted that since the density of PET (1.35 g/cc) is higher than that of PP (0.910 g/cc), PET is heavier at the same volume, and the actual material cost difference will be further reduced. For example, in stretch blow molding applications, the price of transparent PP copolymer is approximately 56 cents/pound, while PET is 63 cents/pound, but considering the density difference, an OPP bottle of the same volume is 40% cheaper than a PET bottle.
The use of recycled materials can significantly reduce costs. The price of recycled plastic accounts for 80% of the cost of recycled granules. Taking PET as an example, a 200 RMB increase in the purchase price of waste bottles per ton leads to a 300 RMB/ton increase in the price of recycled granules. However, the quality of recycled materials varies, especially in food-grade applications, where the purity and safety requirements for recycled materials are extremely high, which limits the large-scale application of recycled materials.
2.2 Processing Costs
Processing costs involve multiple aspects, including equipment investment, energy consumption, and production efficiency. PET has a processing temperature range of 10-15°C, while PP has a narrower processing temperature range of only 3-5°C, requiring more precise processing techniques. PET requires higher temperatures for molding, but offers good dimensional stability after molding, making it suitable for blow molding; PP is easier to process and can be molded through various methods, such as injection molding and extrusion, and maintains good ductility at low temperatures.
In terms of equipment investment, PP preform production lines are less expensive than PET preform production lines. However, PET production efficiency is rapidly improving; by 2025, global annual PET bottle production is expected to exceed 580 billion units, with source factories achieving a 35% reduction in energy consumption and a yield rate increase to 99.6% through process innovation. Particularly with the adoption of needle valve hot runner technology, gate residue can be controlled to within 0.2g, reducing energy consumption by 18%.
From an energy consumption perspective, PET bottle processing only requires 200-280℃, which is approximately 70% less energy than the high-temperature melting of glass bottles (above 1500℃). However, PET production requires pre-drying treatment to prevent hydrolysis, adding extra steps and costs. PP processing is relatively simple, but increasing mold temperature or extending holding time to ensure product quality will increase energy consumption per unit product by 7%-12%.
In terms of equipment investment, PP preform production lines are less expensive than PET preform production lines. However, PET production efficiency is rapidly improving; by 2025, global annual PET bottle production is expected to exceed 580 billion units, with source factories achieving a 35% reduction in energy consumption and a yield rate increase to 99.6% through process innovation. Particularly with the adoption of needle valve hot runner technology, gate residue can be controlled to within 0.2g, reducing energy consumption by 18%.
From an energy consumption perspective, PET bottle processing only requires 200-280℃, which is approximately 70% less energy than the high-temperature melting of glass bottles (above 1500℃). However, PET production requires pre-drying treatment to prevent hydrolysis, adding extra steps and costs. PP processing is relatively simple, but increasing mold temperature or extending holding time to ensure product quality will increase energy consumption per unit product by 7%-12%.
2.3 Transportation and Storage Costs
Transportation and storage costs are often overlooked but represent a significant portion of the total cost. PET's lightweight advantage is particularly prominent in this regard. Due to PET's density of 1.35 g/cc and PP's density of 0.910 g/cc, PP bottles are lighter for the same volume, resulting in lower transportation costs. However, PET's high strength and rigidity make it less prone to breakage during transportation, reducing losses due to damage.
In terms of storage costs, there are significant differences between the two materials. PET bottles are susceptible to moisture absorption, leading to a decrease in crystallinity and compromising temperature resistance; they can only be stored for a maximum of 14 days. This means that PET bottles must be used or sold within a short period, increasing the difficulty and cost of inventory management. In contrast, PP clear plastic cups can be stored for several years without losing their temperature resistance, significantly reducing inventory risk and capital costs.
In terms of storage costs, there are significant differences between the two materials. PET bottles are susceptible to moisture absorption, leading to a decrease in crystallinity and compromising temperature resistance; they can only be stored for a maximum of 14 days. This means that PET bottles must be used or sold within a short period, increasing the difficulty and cost of inventory management. In contrast, PP clear plastic cups can be stored for several years without losing their temperature resistance, significantly reducing inventory risk and capital costs.
2.4 Comprehensive Cost-Benefit Analysis
Considering all cost factors, PP has certain advantages in terms of cost. BOPP bottles are at least 20% cheaper than PET bottles, meaning significant profit margins. However, this cost advantage needs to be evaluated in conjunction with product positioning and market demand.
For high-end juice products, PET's high transparency and exquisite appearance can enhance product added value, and the higher material cost can be compensated for through premium pricing. One snack brand switched to PET packaging for its pastries, allowing customers to see the product clearly through the box, resulting in a 40% increase in sales. This sales growth driven by improved packaging, often offsets the increased material costs.
From a full life cycle cost perspective, although the unit price of PET is slightly higher than PP, its lightweight characteristics bring hidden cost advantages. One bakery company saved over 150,000 RMB in annual logistics costs after switching to PET. In addition, PET's high recycling rate also brings additional economic value, especially in the context of increasingly stringent environmental policies, where using highly recyclable materials can receive policy support and tax incentives.
For high-end juice products, PET's high transparency and exquisite appearance can enhance product added value, and the higher material cost can be compensated for through premium pricing. One snack brand switched to PET packaging for its pastries, allowing customers to see the product clearly through the box, resulting in a 40% increase in sales. This sales growth driven by improved packaging, often offsets the increased material costs.
From a full life cycle cost perspective, although the unit price of PET is slightly higher than PP, its lightweight characteristics bring hidden cost advantages. One bakery company saved over 150,000 RMB in annual logistics costs after switching to PET. In addition, PET's high recycling rate also brings additional economic value, especially in the context of increasingly stringent environmental policies, where using highly recyclable materials can receive policy support and tax incentives.
III. Performance Comparison Analysis
3.1 Heat Resistance Comparison
Heat resistance is a key performance indicator for plastic juice cups, directly affecting the product's scope of use and safety. In this respect, PP has a significant advantage. PP has a continuous use temperature of up to 146℃ and can withstand high temperatures of 100-130℃, making it suitable for microwave heating and boiling water sterilization. PP material can withstand temperature changes from -20℃ to 120℃, making it particularly suitable for hot beverages.
In contrast, PET has significant limitations in heat resistance. The operating temperature range of PET is -40~115℃ (continuous), and it can reach 160℃ for short periods. The Vicat softening temperature is 89℃, the softening point is 230-240℃, and the melting point is 260℃. However, in actual use, PET is not suitable for hot beverages exceeding 70-85℃, otherwise deformation will occur. This characteristic severely limits the application of PET in the hot beverage market.
For plastic juice cups, although most juices are cold drinks, in certain scenarios (such as hot juice in winter, hot soup, etc.), heat resistance becomes a necessary performance requirement. PP cups can easily meet these requirements, while PET cups cannot. Especially in production processes requiring hot filling, PP's heat resistance advantage is even more pronounced. BOPP bottles can withstand temperatures up to 100℃, making hot filling processes for beverage manufacturers effortless.
In contrast, PET has significant limitations in heat resistance. The operating temperature range of PET is -40~115℃ (continuous), and it can reach 160℃ for short periods. The Vicat softening temperature is 89℃, the softening point is 230-240℃, and the melting point is 260℃. However, in actual use, PET is not suitable for hot beverages exceeding 70-85℃, otherwise deformation will occur. This characteristic severely limits the application of PET in the hot beverage market.
For plastic juice cups, although most juices are cold drinks, in certain scenarios (such as hot juice in winter, hot soup, etc.), heat resistance becomes a necessary performance requirement. PP cups can easily meet these requirements, while PET cups cannot. Especially in production processes requiring hot filling, PP's heat resistance advantage is even more pronounced. BOPP bottles can withstand temperatures up to 100℃, making hot filling processes for beverage manufacturers effortless.
3.2 Transparency and Appearance
Transparency is a crucial factor affecting a product's visual appeal. In this respect, PET has an overwhelming advantage. PET has a light transmittance of up to 92%, possessing glass-like transparency, perfectly showcasing the color and texture of beverages. This high transparency not only enhances the product's aesthetics but, more importantly, strengthens consumer confidence. After a snack brand switched to PET packaging for its pastries, customers could clearly see the product through the packaging, resulting in a 40% increase in sales.
PP's transparency is relatively low, usually semi-transparent or milky white, with a light transmittance generally between 60-80%. Although PP can also be made into transparent products through special processes, it can never match PET in terms of transparency and gloss. This visual difference is particularly important in packaging display, especially for brightly colored juice products; PET's transparent properties can maximize the display of the product's attractive colors.
In addition to transparency, surface smoothness and printability are also important considerations. PET has a smooth surface, making it easy to print brand logos and patterns, achieving exquisite packaging effects. PP's surface is relatively rough, and the printing effect is not as fine as PET. This is a factor that cannot be ignored for commercial users who value brand image.
PP's transparency is relatively low, usually semi-transparent or milky white, with a light transmittance generally between 60-80%. Although PP can also be made into transparent products through special processes, it can never match PET in terms of transparency and gloss. This visual difference is particularly important in packaging display, especially for brightly colored juice products; PET's transparent properties can maximize the display of the product's attractive colors.
In addition to transparency, surface smoothness and printability are also important considerations. PET has a smooth surface, making it easy to print brand logos and patterns, achieving exquisite packaging effects. PP's surface is relatively rough, and the printing effect is not as fine as PET. This is a factor that cannot be ignored for commercial users who value brand image.
3.3 Mechanical Strength and Durability
In terms of mechanical properties, both materials have their advantages. PET has higher rigidity and hardness, with a higher flexural modulus than PP, and can withstand greater loads without deformation. PET has excellent tensile strength and hardness, with good toughness, wear resistance, and impact resistance; its impact strength can be 3-5 times that of general films. This high strength makes PET cups less prone to deformation or breakage during use, providing a better user experience.
Although PP has relatively lower rigidity and hardness, it has excellent flexibility and fatigue resistance. Hinges made of PP can withstand over 70 million folds without breaking, a characteristic that gives PP cups a unique advantage in certain special designs (such as a flip-top clear plastic cup). At the same time, PP's low density (0.910 g/cc) makes it an ideal choice for lightweight products.
From a durability perspective, the two materials perform differently in different environments. PET maintains good performance even at low temperatures, while PP becomes brittle at low temperatures, affecting its safety in use. However, PP has better chemical stability and is more resistant to acids, bases, and solvents, which is very important in some special applications.
Although PP has relatively lower rigidity and hardness, it has excellent flexibility and fatigue resistance. Hinges made of PP can withstand over 70 million folds without breaking, a characteristic that gives PP cups a unique advantage in certain special designs (such as a flip-top clear plastic cup). At the same time, PP's low density (0.910 g/cc) makes it an ideal choice for lightweight products.
From a durability perspective, the two materials perform differently in different environments. PET maintains good performance even at low temperatures, while PP becomes brittle at low temperatures, affecting its safety in use. However, PP has better chemical stability and is more resistant to acids, bases, and solvents, which is very important in some special applications.
3.4 Barrier Properties
Barrier properties directly relate to the shelf life and quality preservation of fruit juice. In this respect, the two materials exhibit complementary characteristics. PET has excellent barrier properties against oxygen and carbon dioxide, 30 times better than PP, which allows PET bottles to effectively maintain the carbonation of carbonated beverages and the freshness of fruit juice. PET's gas barrier properties make it the preferred material for carbonated beverage packaging, effectively preventing carbon dioxide leakage and oxygen ingress, extending product shelf life.
However, PP performs better in water vapor barrier properties, being 5 times better than PET. This means that PP cups are more suitable for products that need to be kept dry, or for use in high-humidity environments. For products with high water content, such as fruit juice, PET's overall barrier performance is more balanced, preventing both moisture loss and the entry of external oxygen.
In terms of chemical barrier properties, PP performs better. PP is highly resistant to acids, bases, and solvents, and remains stable in the pH range of 1-14. PET has good resistance to weak acids and bases, but poor resistance to strong acids and bases. For fruit juice products containing fruit acids, both materials can meet basic needs, but PP has an advantage under extreme pH conditions.
However, PP performs better in water vapor barrier properties, being 5 times better than PET. This means that PP cups are more suitable for products that need to be kept dry, or for use in high-humidity environments. For products with high water content, such as fruit juice, PET's overall barrier performance is more balanced, preventing both moisture loss and the entry of external oxygen.
In terms of chemical barrier properties, PP performs better. PP is highly resistant to acids, bases, and solvents, and remains stable in the pH range of 1-14. PET has good resistance to weak acids and bases, but poor resistance to strong acids and bases. For fruit juice products containing fruit acids, both materials can meet basic needs, but PP has an advantage under extreme pH conditions.
IV. Comprehensive Evaluation and Selection Recommendations
Based on the comprehensive analysis above, we can provide a comprehensive evaluation of PET and PP in disposable plastic juice cup applications:
| Evaluation Dimension | PET Advantages | PP Advantages |
| Environmental Friendliness | High recycling rate (65%), mature recycling technology, strong policy support | Low production energy consumption, biodegradable (under specific conditions) |
| Cost | Lightweight design reduces logistics costs, strong brand premium potential | 10-30% lower raw material cost, can be stored for a long time |
| Performance | High transparency (92%), good rigidity, excellent barrier properties | High heat resistance (146℃), good flexibility, high chemical stability |
| Safety | Complies with food safety standards, BPA-free | BPA-free, low chemical migration risk, acid and alkali resistant |
| Home Use | Aesthetically pleasing and practical, suitable for display | Economical and convenient for storage |
| Commercial Operations | Enhances brand image, good printing effect | Suitable for hot drinks, long-term storage reduces costs |
| Event Scenarios | High-end and elegant, strong sense of quality | Highly adaptable, environmentally friendly |
Considering factors such as environmental friendliness, cost, performance, and safety, PET is the preferred material for disposable plastic juice cups in most cases. This is especially true for businesses that prioritize brand image and primarily sell cold drinks. Its high transparency, excellent barrier properties, and mature recycling system give it a clear advantage in overall performance.
However, PP has irreplaceable advantages in specific scenarios, particularly in applications requiring high temperature resistance, long-term storage, or cost sensitivity. Therefore, the best strategy is to flexibly choose or combine the two materials based on specific usage scenarios and needs. For example, a juice shop could use PET plastic cups of coffee for freshly squeezed juice and cold drinks, and PP cups for hot coffee and tea, thus meeting different needs and maximizing the advantages of each material.
However, PP has irreplaceable advantages in specific scenarios, particularly in applications requiring high temperature resistance, long-term storage, or cost sensitivity. Therefore, the best strategy is to flexibly choose or combine the two materials based on specific usage scenarios and needs. For example, a juice shop could use PET plastic cups of coffee for freshly squeezed juice and cold drinks, and PP cups for hot coffee and tea, thus meeting different needs and maximizing the advantages of each material.
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