The mirror cup or commonly called the mirror glass has been the most amazing prop for magicians and magical entertainers. The idea is to switch or vanish objects within the cup.
A mirror section hides the hidden objects - or by just turning the cup around underneath a cloth you can then reveal that an item has magically disappeared.
Be sure to hold the cup at eye level to your audience as they may see the secret section where the items have vanished or hiding to appear.
Use you own objects to create your own amazing magic!