_x005F_x005F_x005F_x000D__x005F_x005F_x005F_x000D__x005F_x005F_x005F_x000D_Product _x005F_x005F_x005F_x000D_Size: Large (x2)_x005F_x005F_x005F_x000D_Before Use:_x005F_x005F_x005F_x000D_You are recommended to wash it before use, or some suggest to put it into oven for 3-5 minute if there is strong silicone smell._x005F_x005F_x005F_x000D_Step.1 Close the tray and try to lock the groove on the side of the skull_x005F_x005F_x005F_x000D_Step.2 Fill in the skull with water from the top hole, sure you can make fruit jello or chocolate skull too. _x005F_x005F_x005F_x000D_Step.3 Put into fridge for about 12 hours_x005F_x005F_x005F_x000D_Extra Tips for Clear Ice Skull _x005F_x005F_x005F_x000D_As mentioned, pure water is one of the factor. Another key factor is you need to control how it cools._x005F_x005F_x005F_x000D_Try to chilling the water more slowly, you will more higher chance having clear ice skull._x005F_x005F_x005F_x000D_You can put it in refrigerator at lower temperature for hours and put to freezer for another 8-10 hours_x005F_x005F_x005F_x000D_Practice make perfect_x005F_x005F_x005F_x000D_