Amazon.com: TrueZoo Diamond Silicone Mold Tray for Whiskey Bath Bombs, Candy, Soap, and DIY Crafts, Dishwasher Safe, 1.75", Blue, Set of 1, Makes 6 Ice Cubes: Home & Kitchen
Source High Quality BPA-free Diamond Shaped 4 Cavities Platinum Silicone Ice Maker Mold Ice Cube Tray on m.alibaba.com