Take victims drink and remove any straws or umbrellas. Cover victims drink with a cocktail napkin. Tell your victim, "I bet you fifty cents that without touching the glass or the napkin or any straws etc., I can drink that entire drink." Push the two quarters towards the victim while betting, point to the glass and the napkin. Continue to say, "I won't touch anything!" Bring up the point about possibly putting a straw through the napkin and say again, "I won't touch anything!"