Expanded polystyrene (EPS) and extruded polystyrene (XPS) are both made from the same raw material, but where they differ is ...

Clamshell containers, cups and other food ware items made from expanded polystyrene foam are popularly—though incorrectly—called Styrofoam, which is a registered brand name for styrene foam ...

and explore why so many people believe that Styrofoam — and polystyrene in general — cannot be microwaved. As a closed-cell ...