light weight polystyrene plastic often used to make cups
Usage: He drank from a styrofoam cup
a white porous solid substance usually cut in odd shaped or forms and inserted in boxes to aid in shipping.
Usage: the styrofoam saved the teapot from breaking.
foam-like plastic material, easy to cut with a knife, and to glue.
Usage: I came across a Styrofoam board to build a model