Updated 2 August 2026 · Written by Daniel Wright
You should only microwave plastic that is labeled microwave-safe. Containers without that label can warp, melt or release chemicals into food when heated. Avoid microwaving takeout tubs, yogurt pots and other single-use plastics. When in doubt, transfer food to a glass or ceramic dish instead.
Only microwave plastic marked microwave-safe. Avoid takeout tubs and single-use plastics; use glass or ceramic instead.
What Is Safe
- Only plastics printed with a microwave-safe symbol or wording are designed for microwave heat.
- Avoid takeout containers, yogurt and margarine tubs, and other single-use plastics.
- Never microwave plastic that is cracked, stained or warped.
- When unsure, use glass or ceramic labeled microwave-safe.
Why It Matters
Non-microwave-safe plastics can soften, warp or melt, and some may leach chemicals into hot food. Microwave-safe plastics are made to withstand the heat. For a safer option, glass and ceramic heat well without these risks. Store leftovers in a glass container you can also reheat in, and see if you can microwave frozen food.
Frequently Asked Questions
How do I know if plastic is microwave-safe?
Look for a microwave-safe symbol or wording on the bottom of the container. If there is none, do not microwave it; use glass or ceramic instead.
Is it safe to microwave takeout containers?
Usually not. Many takeout tubs are not microwave-safe and can warp or melt. Transfer the food to a microwave-safe glass or ceramic dish.
