Topsy Turvy Tricky Bottles by MAK Magic & UF Grant
Two bottles and two metal covers are used. A participant uses one set and you use the other. Both covers are shown empty and then placed over the bottles. They are inverted back and forth, the participant following your every move. However, when the covers are raised, your bottle is always upright. The participant's is always UPSIDE DOWN! Repeat the process as often as they (or more likely, you) want. As a climax, your bottle turns over in its cover, quicker than they can say the magic word 'Abracadabra.'
Supplied complete with real glass bottles, metal covers and routine. Condition is used, with some chipping to the metal covers, as shown.