Basically forever eliminating the tedious task of pumping drinking water through a filter MSR Thru-Link in-line filter easily attaches to hydration reservoir providing a constant supply of clean drinking water when you're on the road. The best thing is that Thru-Link attaches to any hydration reservoir presented on the market and thanks to a two-stage filtration system it removes unpleasant tastes odors, microplastics pathogens and particulate matter. MSR has a long history of developing innovative mountain equipment and we are pleased to report that, regarding Thru-Link, they seem to They don't plan on slowing down anytime soon.