L.Store (R) Ice Ball Maker Mold - 4 Cups Spherical Ice Balls- Black Flexible Silicone Ice Tray - Molds 4 X 4.5cm Round Ice Ball Spheres Silicone ice ball maker: Flexible,durable,eco-friendly,tasteless,non-toxic and easy to clean. Wide range temperature tolerance: -40~+230C. Durable and flexible silicone can withstand thorough abuse. Four perfectly molded spheres of ice from every freezing session. Larger diameter and minimal exposed surface of ice spheres means longer lifespans. Safe for dishwarer,microware,oven,freezer and refrigerator. Suited for baking and ice making. Great for making mixed cocktails, cooling a thermos of water, or making unique gelatin shots!