"It's bigger on the inside"
And so it begins. The most incredible demonstration of teleportation using ordinary objects: a dollar bill, and a SIGNED business card.
The business card is clearly bigger than the dollar, so when it passes through to the other side, it's a startling moment. Instantly you show the card is gone, and you ask your spectator to lift up your wallet which has been in front of them (and far from you) the whole time.
The possibilities are endless with this brilliant new principle.