styrofoam
/ˈstaɪrəˌfoʊm/
noun
- A light, white, plastic material used for packing, insulation, and making disposable cups and containers.
- We used styrofoam cups for the party because they are cheap and disposable.
- The delivery driver carefully placed the styrofoam cooler on the porch.
- The new computer came packed in large blocks of styrofoam.