The rhombus shape of the ice makes for an awe-inspiring visual experience. Made from silicone food grade PP which is non-toxic, tasteless and flexible so it will not break like a hard tray. It is easy to use, easy to fill and easy to release the ice. The puck diameter is 3.2cm making it suitable for a high ball glass. So convenient making 4 cubes at a time. This ice also has a slow melting speed making for perfect drinks every time