Several years ago I put a few dozen dice in styrofoam because I couln't think of how else to store them. I recently decided to take 3/4", 1/4 round molding and make shelfs for the dice. Someone posted that on the board and it looked good. Well IM in the middle of that project, but when I took my dice out of the styrofoam I found one die had deteriorated and became deformed. It actually shrunk. It also blistered. Barry