Drink in style Reinvent the way you enjoy drinking with our multi-functional skull ice cube tray. Imagine your cold drinks enjoyed for longer and imagine the looks you will get with these eye catching ice skulls. Make any drink special with these 3d skull ice cubes. Quick Start Guide Wash tray with dish soap and warm water before first use. 1. Fill lower tray 2/3 with liquid of your choice 2. Fit upper tray into lower tray and gently press down until excess liquid comes out through the small holes on top. The inner grooves should be interlocked. 3. To interlock them, place lower tray on a flat surface and place upper tray on top. Push together until the grooves are engaged. 4. Move trays carefully and place upright in your freezer for 6 hours or longer. Note: The small holes on top are not filling holes. Skull Dimensions 1.57x1.8 inches