Following up on your old trek report; I got a couple of those Katadyn bottles for some fastpacks I went to in 2010. The bottles were very convenient. I saved lots of time and weight. I basically used one. The other one was for "just in case". However, I did think that, at 7+ oz of net weight per bottle, the 'ole Aquafina bottle/pill combo was most likely going to return to my pack. This year however, I am trying Sawyer's "Squeeze Water Filtration System". This system comes in with three different bag sizes and a filter. The system's weight is three (3)oz. That is a 4+ oz savings from the Katadyn bottles' net weight.
I'm going to try this system out in Yosemite and the TRT before heading out N2S in September.
Has anyone out there tried the Sawyer system?