How about boiling it? <img src="/forums/images/graemlins/cool.gif" alt="" />

I use a PUR hiker, <img src="/forums/images/graemlins/smile.gif" alt="" />but one time we camped where there were cows in the marsh along the lake and I don't think the PUR was comlpetely effective, <img src="/forums/images/graemlins/crazy.gif" alt="" /> whereas filtering and boiling would be. <img src="/forums/images/graemlins/smirk.gif" alt="" /> As for fuel weight - I got no problem carrying an extra bottle - <img src="/forums/images/graemlins/wink.gif" alt="" />insures my coffee habit, <img src="/forums/images/graemlins/wink.gif" alt="" /> and frankly 95% of the water I consume is hot coffee from boiled water and the rest is in instant oatmeal. {Every trip ain't an 80- pound gourmet trip.} <img src="/forums/images/graemlins/smirk.gif" alt="" />

Jim YMMV <img src="/forums/images/graemlins/cool.gif" alt="" />