Chinese Boxes Set - Borrowed Coin Vanishes

The Magician borrows a coin from a spectator and has it signed (if you choose).  He/She then puts it inside a transparent case, closing it firmly with four elastic bands.

The case is wrapped in a handkerchief and given to a spectator.  Once the handkerchief is unfolded and the coin has vanished and the case is empty!

The Magician pulls out from his/her pocket a box.  He/She opens it and shows that inside there is another box.  Opening even this one, he/she reveals another case and at last another one.  He/She finally opens the last one, and inside is the signed coin!