I have seen some pretty cool conceptual versions of a Battleship Drinking Game, but this is the first I have seen that is actually available to be purchased. The concept is very simple: if your opponent takes a shot at your ships and hits one, then you have to take that shot. Keep going until all ships are hit or your opponent has to make a place to sleep in the bathroom. To give the game that final touch of realism, each shot glass has a picture of a ship on it.
Product Page (£14.98, about $24)
