Bought the Sawer in-line filter from Sportsman's Warehouse for $39.99 and the Platypus adapter from REI for $3.95.
It fits nicely in my CamelBak, Blowfish, PSK. The water flows by gravity. The filter has a very long shelf life and it is good for 500 gallons. It filters out all the bad bacteria. I wish Doug would review this filter. <img src="/images/graemlins/wink.gif" alt="" />
Learned that a pine dowel and a cedar board work together to make a coal using fire by friction (fire bow) .