1. Remove FroBo Freeze Core from base.
2. Place Frobo Freeze Core upside down on level surface in freezer. FroBo Freeze Core is completely frozen when color turns blue-ish white, less than 2 hours.
3. Remove FroBo Freeze Core from freezer and slip back on base before filling with water. FroBo will keep water cool for 8 hours or longer, depending on the room temperature!
4. Rinse FroBo Freeze Core in sink before refreezing; do not use detergent or a dishwasher as it may cause damage.