Large Sphere Twist Ice Cube Tray is Constructed with Hard Pp Outer Shell & Soft Silicon Inner Liner for Simple Pressing & Quick Ice Release. It Creates Big 2.36 Inch Round Ice Spheres That Melt Slowly to Keep Drink Chilled Without Quick Dilution. the Stackable Design Allows Multiple Trays to be Piled Together to Cut Down Storage Space Inside Freezers. the Sealed Top Cover Prevents Unwanted Flavor Mixing Between Different Food & Ice Inside the Freezer. This Practical Ice Making Tool Fits Well for Home Kitchen Use as Well as Commercial Spaces Including Diners, Coffee Shops & Bars, Ideal for Preparing Whiskey, Cocktail & Various Cold Beverages All Summer Long.