Skull and Crossbones Pirate and Halloween flexible ice cube tray measuring 21cm by 12cm. Flexible tray for making ice cubes in the shapes of skulls or bones. A great alternative to plain old boring ice cubes. Could also be used to make plaster cast decorations. Fantastic party accessory for either a Halloween party or for Pirate parties. Good value and unusual. For an interesting change, add some food colouring or even fuit juice to these shapes for colorful icy treats.