The basic effect is that you display two tubes . Lift the tubes to show a glass under one and a bottle under the other. Lower the tubes over the objects and when you lift them, THE BOTTLE AND GLASS HAVE CHANGED PLACES! The tubes are replaced and in a blink, the bottle and glass are back in their original positions. During the process the tubes are shown to be empty. And yet the bottle and glass will change position upon your command.
Having done this once or twice something goes wrong and you show TWO bottles and NO glass. Trying to hide the error, you try to cover the bottle but THIRD bottle appears. Each time you try to fix the mistake, another bottle appears until YOUR TABLE IS OVERFLOWING WITH BOTTLES! (eight to be exact but the audience will remember much more than that.)
Tubes are metal, 10.75″ tall and almost 4″ in diameter
Bottles are crafted in metal to look like glass and stand 10″ tall
Easy to learn
Brings laughs and applause in a talking or musical act
Supply your own glasses or borrow 2 from your host (which will show they are not gimmicked!)