NiytOwl, I think you bring up some very good points. I was mostly interested to learn that such a low-tech method works, and suggested it for backpacking more tongue-in-cheek. I'd only use it as a last backup myself <img src="/forums/images/graemlins/grin.gif" alt="" /> (or as part of a system like Brum) but I prefer to imagine the chaos it might introduce on some of the more extreme sites <img src="/forums/images/graemlins/tongue.gif" alt="" />

I'm going to look more easily on the thin trickling mountain streams soaking in the sunlight at high altitude, though. Those get UV all day! <img src="/forums/images/graemlins/cool.gif" alt="" /> Mountain water is sounding better and better... I gotta get out of here!