Katadyn filter

chop off or remove the nalgene adapter and hold the hose in the bladder.

Bladders often are Nalgene compatible in terms of the threading for the cap. For example cheap Walmart OR bladder.

I use the following and it works perfectly:

http://www.moontrail.com/general-ecology-first-need-adapter-narrow.php

the Vario comes with a hose that you can just put into you platy. you do not have to screw it to anything if you don't want to. in fact you can just hold the vario over your platy and pump the water right into it without the hose or screwing it on. The water goes in the top and filters out the bottom.

-chad

Not only do you not need a Nalgene it comes with a great bottle clip. I wish more did.

http://tinyurl.com/7yy8zkv

Monty that is an adapter that I knew had to exist. I think we will just go with the simple no weight penalty and hold the hose while filling.

Nalgene Cantenes are made of similar material to the Platypus bags, but with a Nalgene wide-mouth threaded top. Comes in three sizes.

http://store.nalgene.com/Cantene-96oz-p/2595-0096.htm

If you are using a drink tube with your Platypus then pull off the bite valve and plug it right into the blue connector on the bottom of the Vario.

Mike