Simply fill the 2 gallons dirty reservoir with dirty water, hang the bag up and let gravity do the work to make clean drinking water. The 0.1-micron hollow fiber filter removes 99.9999% of harmful substances, microplastics, silt, sand, and cloudiness, all down to 0.1 micron. The water filter straw provides up to 1,300 gallons of clean water per unit with a maximum flow rate of 600ml/min. Made with premium materials for long term durability, you won’t have to worry about punctures or rips during your travels. The water filter can be screwed onto the included water pouch, most standard 28mm or 30mm threaded water/soda bottles, or used to drink directly from water sources such as lakes, rivers, streams, and puddles. This gravity water filtration system, featuring a durable hanging strap, is easily hung for quick hydration, and its 2-gallon large capacity is great for large groups, basecamps, and RV or van travel. The water filter straw has no expiration worries, offering unlimited shelf life and always being ready in your emergency go-bag. Perfect for outdoor survival and essential water needs during activities like hiking, camping, backpacking, travel, emergency preparedness, and on-the-go hydration. Includes: Yuclet 2 gal dirty reservoir with hose and standard quick connector, Water filter straw, Hanging strap, Water pouch, Shut-off clamp, User manual  Yuclet gravity water filter straw for backpacking, camping, survival, hiking, hunting, perfect for emergencies or disaster preparedness such as power outages, hurricanes, roadside car or RV breakdowns, earthquakes, floods, or storms. The gravity water fitration system inclued 1 dirty water bag (with 2 gallon hold capacity), 1 water filter straw (1300 gallon), 1 squezze water pouch (with 20 oz hold capacity), tree trap.