An automatic self cleaning system injects unstable oxygen into the water cooler. This charged oxygen destroys bacteria on contact, preventing the bacteria biofilm buildup that occurs in regular coolers. This keeps your water tasting fresh and sanitary over years of use. In normal water coolers, bacteria levels are often hundreds or even thousands of times higher than government recommended safety limits as they are seldom cleaned. Our powerful self cleaning system kills bacteria 6 times a day, preventing biofilm. It has more stainless steel in the front than any other top loading water cooler. The mostly stainless front is designed to match your high end kitchen appliances, or add elegance to any room. Uses professional grade ice chill technology to make frigidly cold water. Proprietary heating technology keeps the water steaming hot, ideal for a strong cup of tea. * The self cleaning system does not purify or filter water, you must always use quality water.