Granted the thermodynamics lesson is all well and good. The more interesting point is in the making of ice cubes (or spheres). Apart from pitching some produc

Granted the thermodynamics lesson is all well and good. The more interesting point is in the making of ice cubes (or spheres). Apart from pitching some product, it's the water. Sufficiently purified water (ie reverse osmosis) produces glass-clear ice. Cloudy ice contains dissolved sediment typical of tap and barely filter water.