what bottles are pump compatible?
KINO Y Any large mouth Nalgene type bottle is compatible to screw onto the filter. There is also a nipple at the bottom so you can attach a tube going into a water bladder if you have one. I use the Camelbak Hydrolink filter adapter along with the hydrolink conversion kit to fill my hydration packs.
GREGG G There are lots of bottles out there now, but I can safely say it works with a Nalgene standard 32 oz big mouth bottle. I have a clones made by Columbia and the filter does not screw on to the mouth very well. It was not cool to find that out in the the backcountry.
JOSEPH B The pump is only compatible with MSR bottles and bladders. I have had this pump for 4 years, and it work ok at best it just takes a long time to filter. A gravity filter on the other hand, I found is quite useful you can pour water in walk-away to set up camp or whatever.
BENJAMIN B It fits with a normal large screw lid Nalgene bottle. There is also adapters to smaller bottles you can purchase. I think it fits other brands as well, but I have only used the Nalgene bottle.