I fill water at home. The idea that you can fill where ever, doesn't cut it with me. I usually get up to two weeks on a tank, plus the "bottled water". I use water from an Artesian well with really great water for drinking, cooking and coffee. I don't use anything but Nalgene bottles for the water, liter and half liter sizes. half the bottles I freeze, and use as needed. I, also, have a three gallon HDPE water container when I will be gone a long time. The washing/flushing water in the tank can be replaced when needed, and the extra 250lbs. I haul around is a lot cheaper to do than buy bottled, regardless of price.