Osmosis by Alex Lourido

You display a full bottle of beer and explain that by manipulating two of three characteristics that all bottles share, you can turn the bottle inside out!

With amazing force and speed, you slap the bottle, and upon turning it around, the bottle is indeed inside out. The labels, which have been in plain view are now on the INSIDE OF THE BOTTLE!

You pop the top of the bottle and pour yourself a drink. And yes, inside is REAL beer.

You hand the bottle out for inspection. There is nothing to find!