Details:Apply suction cup to the bottom of a cup and then the other side to a table. When someone tries to pick up the cup they won't be able too. Works best on a smooth, flat surface. Made of plastic. 1 1/2" diameter. Ages 3+ Looking for more laughs? With wide selection of jokes, gags and tricks you'll find what you need to play a prank on April Fool's day or any occasion requiring a laugh. Fill party favor loot bags with the classic joke toys and keep your guests laughing. Product Highlights: 1 1/2 in. diameter, Flat surfaces required, Made of Plastic, Ages 3+.