The Chop Cup is a mechanical version of the classic Cups and Balls trick.
The Combo Cups and Balls are very elegantly simple. This product is the oldest and most famous effect in magic Chop Cups and Balls Routine.
The performer shows three cups which are empty, and places them on the table. Giving one cup a tap with his wand he lifts it to find a small ball underneath. The ball is vanished only to re-appear under another cup! This is replaced under the cup, but the magic tap causes it to vanish and appear under the cup at the far end. Another ball is discovered and vanished and then another. On lifting the last cup all three balls are found beneath it. Or better produce an onion, lemon and potato beneath the cups as climax. Many variations of routines are possible and available in standard books on magic. Cups are seamless, spun aluminum and one is gimmicked.
Three Spun Metal Cups, One of which is Gimmicked
Four Red Crocheted Knit balls