I paid $39 plus tax for my 23 cup Zero Water unit at Target. The water tasted great for 9 days, then very acidic (sour). My 2 year old cried and spit it out...pretty nasty stuff. I figured I just got a bad filter, so I went back to Target and bought a 2 pack of new filters for $36 plus tax. The new filter lasted 10 days, consuming about 1 gallon per day. So for $80 I got 19 gallons of drinking water; that's about $4.20 per gallon. That's more than I currently pay for gasoline at the filling station. I am returning the piece of junk today. If you're thinking of buying this item, don't waste your time and money. It's just another info-mercial hyped-up piece of crap.