Magician takes a goblet (can be borrowed), puts it on top of a card case and both on top of another goblet. After a few seconds.. SMASH!.. the goblet on top breaks into pieces!

This ingenious electronic device can be placed into a cigarette pack, a book, etc. The Electronic Crasher is the smallest device to break a glass or goblet! Now you don't need a special table to perform this miracle!

The single most practical approach to this type of effect!