An endless list of possibilities for this trick, the folding quarter.  A precision machined and cut coin that folds with a Single Center Cut Fold Mechanism.   Complete with Instructions and spare bands.

Make the quarter appear or fit into places it has no business being, and pull it back out to truly mesmerize the audience.  Coin In a Bottle trick:  A spectator is handed a regular bottle to examine. Next, a coin is borrowed and magically made to penetrate through the bottom of the solid bottle! The bottle is then turned upside down to show that the coin does not fit through its neck. But when the magician shakes the bottle, the coin falls out of it! The coin is then returned to the spectator, and everything can be examined!

Can also be used as a Bite Out Coin.