Satisfy water need for group and family outdoor activities. Miniwell gravity water filter system is not a single user suck up straw. It is a perfect solution for a group people filtration needs when they are on the go. Set up gravity-based water filtering system easily with palm size water filter and 3 Liters reservoir. Gravity system includes tress strap for effortless hanging from tree. It is a good solution when you can't find appropriate height branch. Good choice for soldiers, hiking,camping, canoeing, fishing, hunting, climbing, travel, rowing, scouting, out-door work, survival,emergency and refugee and rescuer in earthquake or flood area etc And it is also an affordable source of drinking water for people who live in the conflict area, riot area, remote village and tribe. Reliable Water Filter Straw miniwell L630 employs 0.1 micron ultrafiltration membranemedical grade material as filter media, which effective against 99.9% the escherichia coli, staphylococcus aureus, salmonellatyphi, cholera bacteria, legionella, and other pathogenic bacteria. 2000L drinkable water with you on the go Filter up to 2000 liters of natural renewable fresh water without using any chemicals. Lifespan can be extended by clean water backwashing Back flush can rinse away impurities that membrane has filtered from water. We set a silicone gasket around mouthpiece. A handy bottle can be covered on gasket for backflushing without leakage. You don't need to keep a syringe on the go anymore. Includes: Miniwell Portable Water Filter Dirty Water Reservoir 3000ml Clean Water Collapsible Bottle1000ml Silicone Hose and Hose Clip Tree strap 1meter FAQ: 1. How often do I need to backwash the system? It depends on how clean or dirty the source water is. When you feel flow rate slow down, backwash can improve flow rate. Note: To extend filter life, always use the best fresh water source you can access. If raw water is cloudy, wait for sediment to settle out until water appears clear and then filter the water above the sediment. 2. Can I use water filtered from the system itself to backwash the filter? Yes. Filtered water from the filter can be used to backwash. Collects filtered water by a clean disposable bottle. Squeezes clean water into filter from filter outlet. 3. How do I know its time to replace the filter? The filter will not allow water to flow when it reaches capacity. If you find water flow slow down or can not come out water through filter, it is time to replace your filter. 4. Does this work on E.coli and parasites like Giardia and Cryptosporidium? Yes. Miniwell L630 is capable of filtering 99.9% bacteria and parasites. 5. Can this filter remove unpleasant taste in raw water? Hollow fiber can not remove unpleasant taste and pigment in raw water. L630 is the most basic filtration system for fresh water filtration with 99.9% removal rate of all bacteria. If you would like to improve the taste of water, miniwell L610, L600 and L620 can fit your needs. 6. Does it filter salt water? No. Miniwell L630 filtration pore size on membrane is 0.1 micron. Dissolved salt passes through 0.1micron membrane. In other words, Miniwell L630 keeps mineral from nature fresh water sources in filtered water. 7. Can I become a miniwell distributor? Yes, we are looking for distributor. Please contact us to learn more.