Hello,

I am looking for a water treatment system after summiting Whitney last weekend.

I hear a lot of valid fear of getting sick and not much discussion on this particular design. While initially incredulous of this design I now find it quite compelling.

1- The water has to/can only pass through the filter to get into the inner filtered vessel.
2- There is a threaded cap and what looks like well over 1" from fill vessel and threaded cap of inner vessel. These treads could always be treated w iodine if extra protection desired.
3- No moving parts to break, no electronics.
4- 11oz weight respectable for comparable systems
5- Relatively fast

The more I look at it the more I like it. Pump and UV systems require just as much extreme care in managing contamination IMO.

Review w user discussion and comment from manufacturer:
Grayl review

What do you guys think?

Also- not important but "Walla" is actually "voilà" a French term. Just sayin'. hehe

Clifford