I bought the 23 cup because of the coronavirus. Did not want to worry about water. So i bought it and fell in love with it. Tasted great. Then 6 days goes by. It tasted worse than my city water, which trust me is terrible. I called the company and they said yup that's it if city water is bad.COME ON REALLY 6 DAYS! I had to go out and buy water because of it and my fiancee has autoimmune so we really shouldn't be leaving the house. By the way the ppm was at 400 after 6 days. Thank you zero water.