I have a brand new, in the box AquaTru reverse osmosis water filtration system that sits on your countertop. I bought 2 of these systems only to discover that one is sufficient to supply water for our whole family (7 people). If you're interested in the purest, cleanest water possible I highly recommend checking out the website aquatruwater.com There you can learn about all the specifics and watch videos showing how easy this machine is to use. There's a video where they filter diet coke into pure water, it's incredible! I love my machine and wouldn't trade it for ANYTHING! I use to have to lug home gallons and gallons of bottled water because I don't want my family to ingest fluoride and other poisons. I looked into Berkey filters but wasn't satisfied with the level of fluoride left in the water. That's when I started researching RO filters and found this brand. I love it because it doesn't require a plumber to install and it only takes up as much space as a coffee maker. I get unlimited pure, clean, fluoride-free water without the chemicals from plastic bottles. I paid $368.95 each and am asking $200, cash only please. If you're interested, please call or text. Thanks for looking!