The performer apparently shows two Cylinders, under one of which is a bottle, and under the other a glass. The magician makes a Magic pass, and the bottle and glass are found to have changed places, with the bottle now appearing under the Cylinder where the glass was, and vice versa. This is repeated a number of times and can be played for a lot of comedy.
For example an assistant can be chasing the bottle, and every time he selects a Cylinder, he finds the glass under it, while the bottle appears under the other Cylinder. After a few changes, as the magician is apparently talking to the audience, the assistant creeps up to both the cylinders and finds the bottle in one, which he steals away. He now smugly asks the magician to perform the trick again . The magician apparently unaware that the bottle has been stolen away, continues to perform the trick as before, leaving the assistant and the audience doubly amazed. A very good presentation idea is to show only the glass, after the bottle has been stolen. You lift off one Cylinder, and show the glass. You do not lift off the other Cylinder - just look a little puzzled, and pretend to bluff .... stating here's the glass, .. so obviously, there's the bottle! The audience starts howling, asking you to produce the bottle, which they have seen stolen ! You look embarrassed, and continue with the effect, passing the glass to other Cylinder (without showing bottle), and you'll soon have the whole audience screaming ! Finally, reveal the bottle under the second Cylinder .... for a climax !
Spun metal non rusting bottles, and crafted powder coated metal cylinders, with routine.