styrofoam

[U] [trademark]
a soft light plastic material that prevents heat or cold from passing through it, used especially to make containers
聚苯乙烯泡沫塑料〔尤用于制造器皿〕;
SYN polystyrene [BrE] :
a Styrofoam cup
聚苯乙烯泡沫塑料