When we went on vacation to the beach, I took an afternoon to pound away at the candy experiments book. One experiment was on dissolving chocolate, so I pulled out some of the glasses in the cabin, filled them up, and dropped in chocolate pieces:
Here's something this teetotaler never knew before: some shot glasses are so narrow you can't fit a spoon down inside to scoop out a piece of chocolate! (Luckily this was a well-stocked cabin: I soon turned up something like a pickle fork that worked just fine.)
This photo is of one of the chocolate experiments, with tiny fragments of chocolate dissolving at the bottom.