Fengbao Ice Ball Maker - 4 x 4.5 cm 4 Sphere Mold Ice Cube Tray. Ice Press Alternative (single pack) Spheres have less surface area than equivalent ice cubes, which means they melt slowly without diluting your drink Easy to clean and dishwasher safe Easy-release food-grade BPA-free silicone tray won't crack in the freezer Makes perfect 2" ultra-slow melting ice spheres - perfect for whiskey, scotch, bourbon and cocktails Great housewarming or hostess gift