Safe material: This ice ball maker is made of food grade silicone and AS material. It is safe, BPA free, hygienic, non-toxic and odorless. The silicone and AS lid closed well at the edges. Easy released design: The bottom of the ice ball maker mold is made of good quality soft silicone material, which makes it easy to release the ice ball. To release the ice ball, you can squeeze the silicone bottom. After taking out from the freezer, it is recommended to let the mold and the ice ball stand for one minute to release. BEAUTIFUL LOOK: This cute candy colored light bulb sphere ice cube mold is a beautiful accent in your freezer. When you take the cute round ice cube mold out of the freezer and take the perfectly shaped ice ball out of it, you will feel that making ice balls is not just a process, but a pleasure.