Borrow a coin and have it initialed with a marker. Then hand out a plastic drinking straw to be examined. Then, the magician impossibly inserts the coin INSIDE the straw, and even dragged down the entire length of the straw. And the spectator's initals can be seen through the stretched plastic of the straw the entire time. Best of all, everything can be handed out and closely examined.
Ingenious gimmick works with many sizes of borrowed coins including quarters, dimes, nickles and coins from around the world
Only basic sleight-of-hand
Straws are everywhere
CAPPER - Cause a borrowed coin and a bottle cap, to change places in the spectator's own hand, despite the very different shapes of the items!