Is Styrofoam microwave safe?
Styrofoam is the brand name of a plastic product (yes, Styrofoam is a kind of plastic) whose generic name is polystyrene. The white foam used, for example, in hot beverage drinking cups (Styrofoam proper) isn’t the only kind of polystyrene used for food: Clear plastic “clamshell” containers are also made of polystyrene. Contrary to popular belief, some Styrofoam and other polystyrene containers can safely be used in the microwave. Just follow the same rule you follow for other plastic containers: Check the label.