I am new here, but want to add a +1 for some means of potable water. I was looking at the Doug Ritter PSK and noted that the only method seemed to be using the aluminum foil to boil water which is OK in cold weather but who wants to drink it without waiting for it to cool down if it 90+ degrees outside. As for Micropur tablets, you need to wait 4 hours and still need something to put it in although I suppose the survival pouch would work or whatever you brought your initial water supply in.

But when your initial water supply runs out and you don't have time to boil or disinfect, what do you all think of the Frontier water filter straw - it weighs 1 oz.