Any Drink Called For

Any Drink Called For (also known as "the Magic Bar) is an effect where the magician pours from a single container different drinks requested by the audience.

A precursor to the effect was the Inexhaustible Bottle in which a large volume of liquid, much greater than the its capacity, is poured out.

Charles Hoffman developed a whole routine around effect as "Think-A-Drink Hoffman"

• http://blog.chambermagic.com/curiosities/think-a-drink