Have lurked here for a while and finally may have something to contribute. I have seen the querries/wonderings on an expedient method to carry/store water in a survival situation and suddenly had an idea.....the idea sprang from paddling survival training where one is wearing pants...we were instructed to remove the pants, knot the distal end (the ankle area of the pants, then swoop the pants through the air holding onto the waist catching as much air as possible thus providing expedient flotation....turning this to modern travel wear I thought of the zip off pants that so many of us wear. In fact I haven't bought a pair of pants in the last 3 years there were not zip-off....I even wear them into the hospital as part of my uniform (I happen to like the REI Sahara Pant)....OK, now how does this provide an expedient water storage vessel for survival? That same zipped off leg can be knotted at the bottom to store water, a pit could be dug and the 'leg' full of water placed therein......using the parachute cord in your kit and your needle the top could be closed, if you have time a hot awl could pierce and seal make-shift grommets that would contain a small length of para-cord to allow for closing.....that same para-cord could also be used to create a make-shift should strap system so the 'leg' turned into water bladder could be carried in the center of the back while hiking though the para-cord would have to be significantly padded because the length of the zip off leg in a pair of REI Sahara pants would hold enough water to provide enough weight for the para-cord to easily cut into the shoulders.
OK that's my first contribution....please pick it apart for merit or idiocy!
Robert