4 Piece Silicone Mould of Large Ice Spheres for s and Party Drinks A sphere exposes less surface area for the same amount of volume as a cube of ice. Shave off a few corners, and you've got less surface area, which means the ice will melt more slowly and stave off dilution. Dishwasher Safe Mould Dimensions: (Width)16cm x (Depth)15cm x (Height)7cm Round ice also melts slower than cube-shaped ice, so that's worth something if you want to nurse a glass of good whiskey slowly. Creating 4 ice spheres, an interlocking silicone ice mould is perfect for chilling your s. The large round block of ice allows the to cool quickly, without watering down the . If the ice is too small, it will dilute the taste and the balance of the . This silicone ice mould has an interlocking closer that clicks the two pieces together. Fill with water through the holes at the top, and as the water freezes four spheres are formed. The Ice Tray is dishwasher safe however we do recommend hand-washing to maintain its shape.