Acetone (in my case used as nail polish remover) can dissolve polystyrene. Dip a piece of Styrofoam in acetone and styrofoam disappear after a while. In my case this way, dissolved in a container made of polystyrene.
NOTE: do not do it alone, unaccompanied by an adult. Chemicals are very dangerous.
I'm sure you disposed of the end result in a responsible way...
...by making meth.
paulyshore98 2 months ago