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Styrofoam
Material
Styrofoam
Material
Styrofoam
Polystyrene foam food containers
Where styrofoam can go
Microwave
Verdict:
YES, WITH LIMITS
Yes, but only when the specific foam container is clearly labeled microwave-safe or comes with microwave heating instructions, and your microwave manual permits it. Put ordinary Styrofoam takeout boxes, cups, plates, and supermarket foam trays in the no category. Heat from the food can deform or melt unrated foam and may allow packaging chemicals to migrate into the food.