This holocaust survivor spent 1942-1945 in death camps, and managed to survive without ever drinking water. His strategy? to have a pebble in his mouth. I didn't know that was possible until now, and thought all of you might want to throw a pebble or two in your bug out bags.
http://tellingstories.org/holocaust/lowenberg/wlowenberg_frameset.html
When I got to Auschwitz somebody said to me, the same friend, he said, "Don't drink the water, the water has typhoid in it." So, what do you do? So he said, "Pick up a pebble," there was a pebble in the street, a little stone pebble. I picked up that pebble, I wiped it and I put it in my mouth. I had it all the way through the camps and that created enough saliva that I didn't get dehydrated. But we never drank the water there was an enormous amount of typhoid. The other thing, which was very prevalent, that's why a lot of people died, too, because of the type of food we got and the water we drank, diarrhea was a big killer.
http://tellingstories.org/holocaust/lowenberg/wlowenberg_frameset.html