Inexhaustible Sponge trick
"The Inexaustible Sponge by Gaetan Bloom and Kevin James At anytime during your performance, you wipe your forehead with a sponge and squeeze it over a bucket, producing large amounts of water from the sponge! You leave the sponge on the tray and with no cover, switch or suspicious moves, you are able to repeat the effect just moments later. This is a great running gag which you can repeat as many times as you wish. It also comes with ideas for several surprise endings. The water in the bucket can become confetti, turn into a block of ice with a selected card inside or just vanish. Comes with tray, special sponge and instructions. You supply the bucket and water."
Kevin James' Imagination Unlimited