The performer displays 5 different bottled beverages. He explains that one of the brands has hired him to advertise their drink because he discovered a method which makes someone prefer it. A spectator is then blindfolded with a silk, the magician lifts one of the bottles, Sprite for example and lets the rest of the audience know this is the preferred drink. Another spectator then silently chooses one of the other drinks, let's say Coca Cola, and this beverage is poured into a glass which is handed to the blindfolded participant. They will swear that it tastes like Sprite! The same drink is even handed out to other spectator's to taste and it's most definitely Coke!