Package: 1 set (3pcs cup and 4pcs balls)
Made by SUS 304 Stainless Steel.
This gimmick is made by Stainless Steel, not like others (plastic in copper color), it's super and professional gimmick.
Place three cups on the desk. Put a ball on the middle cup's top.
Cover the other cups, so the cups overlap.
Pat the overlapped cups with your hand, then the ball goes through
the bottom and falls on the desk.