【100% BPA Free】- The circle ice cube tray is made of food grade silicone and AS material, non-toxic, odorless and BPA free. The high quality AS material gives our ice sphere maker a high gloss and transparency, with good impact resistance and mechanical properties, which greatly extending its service life. 【Easy to Use】- Just pull out the silicone dust cap in the water filling port at the top of the whiskey ice mold, and fill the ice mold with water up to the maximum water level. There is no need to split the puck mold into two halves. We also provide a small funnel for you to fill the mold. 【Perfect Ice Ball】- The special waterproof ring design of the bottom of the ice sphere maker and the lid at the intersection ensures its tightness. Even when filled with water, it will keep a perfect ball and no water will spill out from the intersection. The just right splicing structure ensures the smooth roundness of the ice ball. 【Easy Release Design】- The bottom of the ice sphere mold is made of soft silicone. You can easily release the ice ball by squeezing the silicone bottom. We recommend that you let the ice ball molds leave for 1 minute or rinse water for 15 seconds after removing them from the freezer before releasing them. This will make it release easier. 【Large Ice Cube Molds】- This ice cube balls mold will make a large 2.5 inch ice ball for you. It will melt more slowly than smaller ice cubes, keeping your drink cold and refreshing for longer. You can also make ice balls with iced tea, cocktails, whiskey, and coffee as ingredients to give you a more original tasting drink.