Features: 1.Food-grade materials: The ice cube tray set is made of food-grade pp materials which are BPA-free, safe, and durable. (Attention: Please do not wash with hot water) 2.Easy to Release: These ice cube trays are made of hard plastic which makes round ice cubes easier to release than silicone ice cube mold. After taking the mold out of the freezer, open the lid and slightly twist the tray to release the ice. 3.Easy to Use: Simply rinse the circle ice cube mold under a water tap and fill the water in. No need to pour water in one hole after another. Freeze for 4-8 hrs, you can get 33 pcs sphere ice balls. (2 trays can produce 66pcs balls at one time) 4.Saving a Space: Removeable lid for resisting dirt and odor, also allows you to stack up 2 ice trays together, much space-saving. 5.Wide Application: DIY food, can be used to make ice cubes, pudding jelly, and perfect for whiskey, cocktails, Coffee, infusing fruit, or herbs.