This is one of the oldest classics of magic. The unique qualities of this glass are that it is unbreakable and easily washable.
The basic effect is that a glass full of milk visibly diminishes, leaving just a couple of sips at the bottom.
The use of this glass is limited to your imagination. To name a few:
Overall it is a comedy prop and a sure hit with children.
It measures 5" in height & 2.5" in diameter.