HEYO Natural Sterilizing Water Maker Healthy sanitary habit That protects you everyday, everywhere Electrolytic sterilizing water maker, HEYO, is A product from purely domestic technology and it is manufactured in Korea. With Special ESWM technology, it electrolyzes And converts General tap water into electrolyzed sterilized water. *ESWM Selected for SME technology development / K-Startup growing technology development project - supported technology. *What is electrolyzed sterilized water? If you put general tap water into HEYO, It creates hydrochloric acid water with its embedded special equipment. Hydrochloric acid water has the power of sterilizing and deodorizing and it is also called the electrolytic sterilizing water. this electrolytic sterilizing water is also used as food additives and it is evaluated as a safe substance.