I am about to invest my money in a ro/di unit. I know there might not be one out there, but is there one that I dont need to tap into my plumbing? I live in a apartment and I dont want to poke a hole in their pipe. Like some kind of unit I can pour the water into like a coffee machine. Lol that gave me an idea, never work. I wish it was that easy. Dont walmart sell ro/di water? Or just RO?