It is a game. A game of battleships but with lemonade instead of ships and submarines. The ships are replaced by raspberry lemonade, the submarines are replaced by lime lemonade. Every time a ship is destroyed the oposing player must drink the entire bottle as fast as they can.
Hey Bill would you like to play Battleschweppes?
What's that Fred?
Well you play with bottles of lemonade instead of ships and submarines. And every time i kill your subs or ships you have to skull a bottle of it.
Hey sounds great! lets play!