product description:

Cap in Bottle

The Effect
Here's the deal： you borrow a normal beer or soda bottle from someone—anybody—at a bar， restaurant， party， or whatever. You grab a couple caps off the bar and give them to the participants to examine; one that will end up inside the bottle and one to cap the bottle with to keep the bottle secured.

You hold the bottle in your hand， snap the cap on the bottom once， twice， and bang! It is inside.

As simple as that!

You immediately hand the bottle back to the person you were working with to be examined; you are totally and unequivocally clean. Believe it. It is that quick. Lighting fast.

Prohibition can be done totally impromptu， completely surrounded， and it is totally visual! Seriously， watch the demo and see if you can catch it; they sure won't. They'll just sit there and look at you with their mouths wide open—totally "gob smacked" as the Scots say.