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Just discovered R/O water at my local Wal-mart, it's the green label bottle marked " Drinking water" At 58 cents a gallon it is a bargain for anyone who does not have an R/O system yet.
Some stores have an RO water dispenser that will sell you water into your own container by the gallon. I haven't seen any of them around here in Ga either, but I haven't really been looking either.
ebay has under the sink set ups for about $100-$150. they make up to 75 gallons a day and are a great long term investment because you could also use it for drinking water.