Practical joke cocktails: freeze Mentos into the ice-cubes, add to Diet Coke drink

Wired's HOWTO wiki suggests freezing Mentos into ice cubes and then serving them in Diet Coke-based cocktails as a kind of timed practical joke (the cubes melt, and the drink turns into a volcano). Diet Coke is recommended "because it isn't sticky."

Mix an Exploding Drink

(via Neatorama)