Pac Man shot glass set
Pac-Man shot glasses, from Namco itself. The game works like this: every time you are eaten by a ghost, knock back whatever your friends have put in the relevant ghost glasses. Eat fruit, and you sip from the corresponding glass. When Pac-man dies, guzzle from his own wee tumbler.
When you die, it's game over.
PAC-MAN COLLECTORS' SHOT GLASS SET [Club Namco via Fidgit]

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Those are great, and would almost be perfect for a game of Pac-Man Vs.. I say "almost" because there are only 3 ghosts in that version, and one of them is green if I recall correctly. Still, disregard one of the ghost glasses and it's perfectly workable.
Well, it should also have the blue "after pill" ghosts on the other side, and a dying pacman on the other side of pacman, and a power pill behind the fruit. That would be a nice drinking game, although I guess nobody would go over the 1st stage.