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 forsoldiers hikingcamping canoeing fishing hunting climbing travelrowing scoutingout-door work survivalemergency 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 Strawminiwell L630 employs 0.1 micron ultrafiltration membrane( 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 goFilter up to 2000 liters of natural renewable fresh water without using any chemicals. Lifespan can be extended by clean water backwashingBack 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 FilterDirty Water Reservoir( 3000ml)Clean Water Collapsible Bottle(1000ml)Silicone Hose and Hose ClipTree 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. Origin:CN(Origin) Brands:miniwell Type:Outdoor Water Filter Model:L630-G Material:ABS , UF(medical grade), Slicone Size:40*136mm Application:Running Fresh Water Source Water Flow:0.6L/min