Product details:

Make clear ice in any freezer from regular tap water Makes 4 clear, large 2" x 2" x 2" cubes Simply fill tray with water and freeze for 18-22 hours Proven to purify water, removing 95% of TDS and metals. Taste only your drink. These molds are BPA free True Cubes offers a simple solution to the age-old issue of foggy ice. By mimicking the freezing process found in nature, True Cubes makes it as easy as turning on the tap to make clear ice cubes. No special gadgets, tools, or additives are required.