The 3D Skull Ice Cube Tray makes four realistic skull-looking ice cubes. It makes four 2" x 1.5" skull ice cubes at a time and one ice cube fills the entire whiskey glass. Ice cubes of large size melt slower than conventional ice cubes so they keep your drinks cool longer without diluting quickly. The upper tray prevents ice cubes from developing a foul odor while in the freezer.