Can Plastic Lunch Boxes Be Frozen?
author: Iris
2025-07-14
1. Why Is It Important to Consider the Performance of Plastic Lunch Boxes and Whether They Can Be Frozen?
Freezing is a function that is used a lot in daily life, and it is also a food safety issue in low-temperature environments.
The Rise of Frozen Transportation and the Pre-Prepared Food Market
With the popularity of the pre-prepared food industry, the freezeability of lunch boxes has become a core consideration for corporate customers when purchasing.
The popularity of best freezer meal prep containers reflects the rigid demand of the market for such products. In order to ensure stable transportation, many brands will adopt the method of pre-freezing and then transporting, which requires plastic lunch boxes to have good cold crack resistance, stacking, and anti-leakage performance.
The Test of the Low Temperature Environment on the Lunch Box Structure, Sealing, And Brittleness Resistance
At low temperatures, plastic materials are prone to brittle cracking or deformation, which affects the sealing. If the cheap take-out containers break during the freezing process, it is very likely to cause food contamination. Therefore, antifreeze and sealing structure design are issues that companies should pay attention to when purchasing frozen meal boxes.
Corporate Customers Pay Attention to the Integrated Performance from the Refrigerator to the Microwave Oven
A good meal box should not only maintain a stable shape in a frozen state but also withstand microwave heating. The best freezer meal prep containers with both freezing and heating functions can save costs and enhance the brand image, and are one of the most popular categories in the current market.
3. Key Performance Indicators for Purchasing Frozen Meal Prep Containers
With the development of the world economy, consumers are no longer just concerned about price and appearance, and the performance of frozen meal prep containers has also become an important factor.
Are the Low Temperature Resistance Grades (-18°C/-30°C) Marked in Full?
The best freezer meal prep containers have a "low temperature resistance" grade marked on the bottom of the product. If it is not clearly marked, it may not have undergone standard freezing tests, and there is a risk of cracking and brittleness during use. Corporate customers should ask suppliers for corresponding reports or product certifications before purchasing to ensure product safety.
Is the Anti-Cracking and Lid Sealing Design Reasonable?
If the frozen meal box has poor sealing at low temperatures, the lid will fall off very easily. High-quality plastic Chinese take-out containers should have good sealing. At the same time, the overall design of the meal box is also a very important factor. The lock design of the lid can effectively prevent leakage. For catering brands or platforms that require centralized distribution, this design is crucial.
Are the Thickness, Structure, And Stackability Suitable for Cold Chain Logistics?
If the lunch box is not thick enough or the structure is unstable, it is easy to crack during transportation. If you need to purchase cheap take-out containers, then square food containers or thickened ones are recommended. Stackable lunch boxes are beneficial to logistics costs and space management.
Where to Buy?
Huizhou Yangrui Printing & Packaging Co., Ltd. offers specially designed PP and MFPP materials with excellent cold crack resistance and sealing properties. Custom designs are supported, FDA food contact compliant, ISO9001 certified, BPA-free, and SGS certified to meet international export requirements.
Contact us now:
Phone: +86-159 8949 1653
Email: sales@yrpak.com
Email: sales@yrpak.com
References
- Singh, S. P., & Singh, J. (2015). Performance of packaging materials at low temperatures: Cold chain challenges. Journal of Food Packaging, 37(2), 110–119.
- Plastics Europe. (2021). Plastics Material Data Sheets for Food Packaging Applications.
- U.S. Food & Drug Administration (FDA). (2023). Food Packaging Materials and Regulation – //www.fda.gov
- ISO 22000:2018. Food safety management systems – Requirements for any organization in the food chain.
- Huizhou Yangrui Printing & Packaging Co., Ltd. (2024). Product Specification Sheets and Export Certification Documents – Internal company materials.
2. Differences in Performance of Five Mainstream Plastic Materials Under Freezing Conditions
Of course, not all plastics can be safely frozen. If the wrong material is chosen, it will not only increase the breakage rate but may also lead to customer complaints and brand risks.
PP (Polypropylene) – One of the Most Recommended Freezing Materials
The popular choice among the best freezer meal prep containers is PP material, which has high flexibility and heat resistance. It supports integrated refrigeration, freezing, and reheating operations. It should be noted that ordinary PP may still be slightly brittle at lower temperatures. When purchasing, it is recommended to choose thickened PP containers specifically for freezing scenes.
PET (Polyethylene Terephthalate) – High Transparency but Not Low Temperature Resistance
PET has high transparency and good oil resistance, making it suitable for display foods, and is widely used in plastic Chinese take-out containers. However, PET easily becomes brittle at low temperatures and is not suitable for long-term freezing or stacking storage.
PS (Polystyrene) – the Most Brittle, Not Recommended for Freezing
The common material of cheap take-out containers is PS. The result of low cost is very poor cold resistance. PS is brittle at room temperature, and it is more likely to crack if frozen.
PLA (Polylactic Acid) – Degradable, But Poor Cold Resistance
PLA, as an environmentally friendly material, is prone to becoming brittle in a frozen environment, and is not even allowed to be stored in a high-humidity environment. Although its environmental advantages are outstanding, it is not recommended as the core material for frozen plastic Chinese take-out containers.
MFPP (Micro-Foamed Polypropylene) – Multi-layer Foamed Structure Is Cold-Resistant and Heat-Insulating
MFPP has good heat preservation and extremely strong cold resistance. It can maintain a stable shape regardless of high or low temperature environments. The popularity of MFPP is gradually replacing traditional PP and becoming the representative material of the new generation of best freezer meal prep containers. It is suitable for high-frequency use scenarios such as central kitchens and cold chain distribution.
4. How Does Yangrui Provide Customers with Solutions for Frozen Plastic Lunch Boxes?
As a professional plastic lunch box manufacturer, we not only pay attention to the type of products, but also pay more attention to the performance of the products.
Optional PP/MFPP Frozen Special Material Series
We have various types of best freezer meal prep containers product lines, including PP, PET, and MFPP. No matter which product you need, we can provide it, and PP and MFPP have good cold resistance.
Support Customized Shapes
We support customized lunch box shapes and specifications according to customer needs, such as square food containers that are more suitable for stacking and cold storage, multi-grid partition design, deep plate design, etc. Customized solutions not only improve space utilization but also enhance brand recognition. It is the preferred choice for cold chain customers to improve efficiency and visual unity.
Provide Export Certification Support
Our PP and MFPP plastic lunch boxes can be safely used in freezing, and can provide FDA food contact grade certification, ISO quality management system, BPA-free declaration, etc., to help your brand win more customers in the market.
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