The mini ice ball trays are made of hard plastic which makes round ice cubes easier to release than silicone ice cube molds. After taking the mold out of the freezer, open the lid and slightly twist the tray to release the ice., This ball ice cube tray mold consists of one tray and a lid with small holes. Just pour about 300ml of liquid into the tray at one time and close the lip. Then put the maker into the freezer for 4 hours, you can get 1-inch x 33pcs sphere ice balls., Mini ice ball makers are made of premium food-grade material. BPA-free, no smell, no toxic.Safe and durable., The mini circle ice cube tray comes with a unique design that can make every round ice ball regular and complete., Ideal for whiskey, cocktails, Coffee, infusing fruit, or herbs. Try infusing mint for that perfect Mojito or strawberries for that delicious lemonade.,