Gravity fed "base camp" water filter

[Brewmeister]

The MSR system is very similar to the Platypus except it does not come with a clean-water reservoir bag, for the same cost.

[Hedgehog]

I have the Platypus gravity filter (with the carbon filter attachment) and love it. It works great, filtering two liters very quickly. And yes, I've used it hiking the AT with our scouts. I bought the one without a "Clean" bag because I already have a Platypus reservoir and itmis a little,less expensive). I saw the same one on sale at REI and bought a second. I now use both "Dirty" bags and am saving the filters for when mine needs replacement. Having the extra dirty bag allows me to fill up both bags with water while on the trail and then filter when I get to camp. The only downside is that it is difficult to fill completely from a stream or spring.