Milk caps (game)

Children's game

Milk caps is a children’s game played with small flat circular discs, originally the cardboard caps from milk bottles. Players make a stack of these caps, and take turns to drop a heavier "slammer" object onto it, causing the stack to be disrupted. Each player keeps any face-up caps and is to restack the face-down caps, repeating the process until none land face-down, at which point the player who collected the most caps wins the game.

From Wikipedia, under CC BY-SA. More on occurri.