styrofoam is cool

a cup made out of styrofoam...........................................................................................................................................................................

Styrofoam is an insulator.

You can find styrofoam koozie on this link:--

http://www3.shopping.com/-styrofoam+koozies

Because Styrofoam contains many tiny pockets of air it is a good insulating material. Heat transfer is hindered because the molecules are not able to move around much because of the millions of little air pockets.