Russian Roulette Vodka

Russian Roulette is a Dutch brand of vodka shooters, but billed as a party game. Inside the octagonal box, designed to resemble a gun cartridge, are four bottles of shooters.

One of the shooters contains a harmless substance that causes your tongue to turn green. After the shooters are downed, whoever ends up with the green tongue has to carry out a pre-determined "dare".

Might be a way to carry out Russian Roulette version of strip poker.