It’s a tiny squeeze-to-pump ... MSR filters, the Trailshot has a positive end-of-life indicator: the filter slowly clogs over time, and will stop passing water when it’s unable to clean ...

MSR spent six years designing this water filter for the military ... the filter getting clogged. With every pump, the purifier uses 10 percent of the clean water to flush the contaminants back ...

The U.S. military asks them to create water filtration technology ... popular for its large surface area. Either way, MSR has the top-selling pump filter in North America for the last 20 years.

A surefire way to ruin any camping trip is to contract a water-borne ... I'd recommend a gravity filter like the LifeStraw Flex with Gravity Bag or a pump filter like the MSR Guardian for these ...

A friend owns an older version of an MSR water pump filtration ... also comes with a scrubber pad. A clean filter will also reduce the time it takes to pump water. The output is designed ...