When I was young I never even thought about water(I do live in what amounts to a swamp) but getting older seems to require more water so if I'm going to be out of the house or travel for any time I take a cooler with several bottles of water. I don't "nurse" a bottle, get it out and drink it down. When I was still working I would be forced to appear at the office in the capital city at times and noticed that the sales chicks would carry a bottle of water around, never see them drink any? The office had very nice water fountains that worked just fine, I'll bet that water in the bottle came from the same tap.