Styrofoam cup melted in acetone |
Now this material had a counterpart that can dissolve or break down the closed-cell of an interlocking chain of styrene, the chemical is acetone commonly used in removing nail polish also it can do an impressive damage to a Styrofoam cup.
This video from YouTube channel LET'S MELT THIS, shows how this organic solvent can quickly melt Styrofoam into a "melting glob of awesomeness" as they called it.
Source: YouTube by LET'S MELT THIS