It never seems to amaze me how many people feel they will suffer some ill effects if they don't have their precious water supply with them everywhere they go. How in heavens's name did we ever survive the entire history of mankind without carrying a bottle of water everywhere? Comedian Lewis Black had a great routine about folks carrying their bottled water in a sling in front of them like a "little baby" as seemed to believe they needed it, like they were crossing the Gobi Desert every day. And they were very proud that their urine had "no color." Sure, right now in the Texas heat one must keep hydrated, especially if you stay exposed to the heat for long periods. But please, even those that never leave the air conditioned comfort of their home, business, vehicle, or other climate controlled places have that ever-present water supply with them at all times. I know, TEOTWAWKI can happen anytime, and I know they will feel a lot better to have that extra few minutes of life because they have their water supply with them

Here's some interesting articles about how much water one needs. Take your pick:
https://www.google.com/search?q=are+we+ ... 8&oe=utf-8