Can You Microwave Plastic Plates?
It is not usually recommended to microwave plastic plates, which includes plates made out of foam. If they are not labeled as microwave-safe, they may melt, warp, or even catch fire during heating cycles. However, if the manufacturer explicitly labels them as “microwave-safe”, the plate likely shouldn’t melt or warp.

Are Hefty foam plates microwave-safe?
No, it is not recommended to microwave foam plate products such as Hefty® Everyday™ Foam Plates and Hefty® Deluxe™ Plates and Platters.
If using these foam plates, they work best for serving or eating food that has already been heated up in a different dish. Their strength and durability help prevent food from soaking through the plate. And they make cleanup a breeze—simply toss in the trash when you’re done.
What plates are microwave-safe?
Hefty® paper plates can be used in the microwave. So, instead of using foam plates for your next microwaved meal, consider using one of the following paper options instead:
Hefty® Compostable* Paper Plates and Bowls
Made from 96% plant-based materials, compostable paper plates from Hefty can be used in the microwave. The same material also comes in bowls. Both the paper plates and bowls are super strong and help make sure food won’t soak through.
Hefty® Zoo Pals® Plates are microwave-safe for reheating food. These fun, full-color plates feature 10 different animal designs and have built-in sections to use for sides or dipping sauces.
*Commercially compostable only. Commercial composting facilities may be limited. Check locally to confirm acceptance. If facilities are not available in your area, discard in trash.