MSR AutoFlow Gravity Filter;

FEATURES of the MSR AutoFlow Gravity Filter Hollow Fiber technology Quick and easy tool-free cleanings maintain high flow rates on extended expeditions No Pumping : Lets gravity do the work so you don't have to Fast : Filters more than 1.75 liters per minute Field-Maintainable : Can be cleaned repeatedly without disassembly for flow recovery Adaptable : Filter directly into most any bottle or reservoir with included Universal Bottle Adapter AutoFlow Gravity Microfilter represents the latest evolution of backcountry hydration, combining filtration, storage and collection into a single, pump-free system AutoFlow microfilter is fast as well-up to 1.75 liter per minute without a single pump stoke 4-Liter reservoirs allow you to filter large quantities at once making it perfect for groups, while quick and easy tool-free cleanings maintain high flow rates on extended expeditions