American physician and inventor John Gorrie built a refrigerator in 1844 to produce ice in cool air.[4] Guy L. Tinkham, a household product executive, invented the first flexible, stainless steel, all-metal ice cube tray in 1933.[2] Commercial pre-filled disposable ice trays for home freezing are designed to provide better taste and reduce the risk of contamination.[7] The design was subsequently revised to feature individual compartments for each ice cube, with a seal at the bag's entry point.When water is cooled to its freezing point, and ice starts to form, dissolved gases can no longer stay in solution and come out as microscopic bubbles.Commercial ice-makers use a flowing source of purified water to make ice with cooling elements at the bottom, allowing the bubbles to be washed away from the top as the cube grows.