Bone Chillers Ice Cube Tray. Makes Skull and Crossbone Shaped Ice Cubes Skull- and crossbone-shaped ice cubes will have mateys lining up to walk the plank for more of your cold concoctions Single tray makes 8 cubes, evenly divided with four skulls and four crossbones Made of food grade material Safe to clean in the dishwasher, the tray is easy to care for Great for Halloween parties