• July 13, 2026

The Safety of Plastic Food Containers in the Freezer

Meta Description: Learn about freezing food in plastic containers. Understand safety concerns and best practices for plastic in the freezer.

 

Freezing food is convenient and reduces waste. But are plastic containers safe for freezer use? Here's what you need to know.

 

Freezer-Safe Plastic

 

Most plastic containers are freezer-safe if labeled. Freezer-safe plastic is designed to withstand low temperatures without cracking or becoming brittle.

 

The Chemical Concern

 

Plastic containers may leach chemicals into frozen food. Freezing generally reduces chemical migration compared to heating. However, as plastic degrades over time, leaching can occur.

 

BPA and Substitutes

 

Older plastic containers may contain BPA. Even BPA-free plastics may contain substitutes. While freezing is safer than heating, chemicals can still migrate slowly.

 

Temperature Stress

 

Freezing stresses plastic containers:

Cold makes plastic more brittle

Expansion from freezing food can crack containers

Repeated freeze-thaw cycles degrade plastic

Cracks can harbor bacteria

 

Plastic vs. Glass for Freezing

 

Glass containers are generally safer for freezing:

Don't degrade in cold temperatures

No chemical leaching concerns

Last indefinitely

Show contents clearly

 

Glass containers require leaving headspace for expansion.

 

Safe Plastic Freezing Practices

 

If using plastic containers in the freezer:

Use only freezer-safe labeled containers

Leave headspace for expansion

Don't overfill

Replace if cracked or brittle

Don't microwave frozen food in plastic

 

Labeling and Rotation

 

Label all frozen plastic containers with:

Contents

Date frozen

Use-by date

Rotate frozen items, using oldest first.

 

Long-Term Storage

 

Plastic containers are suitable for short-to-medium freezer storage (up to 3 months). For longer storage, glass or stainless steel is recommended.