DIAMOND CORAL, an exceptional water machine, She is believed to be the World's First Refined Water Machine. European renowned product designer & water specialists combined the Art of Refined with Natural Water Purifying Principle, set a whole new standard to all water filters. DIAMOND filter machine uses various natural purifying materials, with its multiple filters design, formed a unique water purifying system. DIAMOND CORAL also uses precious natural coral calcium to produce natural alkaline water whilst maintain beneficial minerals in the water; its quality is comparable to natural mineral water. DIAMOND CORAL water machine is world's few that passed over 200 performance measurements and safety testing, being awarded NSF42 and 53 Gold Seal by USA Water Quality Association (WQA).