Answer:
A plastic cup is a cup made out of plastic, commonly used as a container to hold beverages. Some are reusable while others are intended for a single use followed by recycling or disposal.
Styrofoam™ cups is what cups made out of polystyrene foam, or plastic #6, are commonly referred to. However, the term Styrofoam™ is a trademark of the Dow Chemical Company and is not used to make food products -- including cups, plates, take-out containers or egg cartons.
