The answer will depend on the size of the cup and, therefore, the quantity of water in it!
thermos cup
Gasoline will melt right trough a styrofoam cup.
It is the Styrofoam cup as it is not a good conductor of heat but the metal cup is a good conductor of heat.
a cup made out of styrofoam...........................................................................................................................................................................
They would float.
styrofoam stupid
styrofoam keeps the water warm hahAHAHAHA
if its a small Styrofoam cup definitely not
a styrofoam cup. i tried it on my science project
Styrofoam cup is a good insulator because it is coated with foam
The cup is solid, but the water remains liquid unless you freeze it into ice.
Styrofoam insulates better than a single layer of plastic. If, however, you have one of those plastic cups that have an outer and an inner "wall" with a sealed air space in between, that should work better than the Styrofoam.