Very Versatile: In addition to being a camping water filtration system, gravity water bag connected suction nozzle can be used as a hydration bladder. The water filter straw plus straw suction nozzle can directly drink natural water, connected water pipe can extend the use. Water pipe added suction nozzle can be more effective drinking water, the filter straw connected to the water bottle to act as an extruded water filtration system High-Efficiency Filtration: The water filter straw is made up of 0.01 μm hollow fiber ultrafiltration membrane, Activated carbon fiber, and double PP Cotton.It filters about 600 milliliters per minute. The entire water filtration system is made of food-grade materials Easy Maintenance: Wide open gravity water bag, water filling and flushing are very fast and convenient. The water filter straw backwash design, Insert a plastic bottle into the outlet of the filter for backwashing, no need for an extra syringe Easy to Use: Just hang on a tree or put the gravity water bag in a high place, hands-free filtration, enjoy effort-free (no pumping, no squeezing) filtered water within minutes. The operation of this gravity-fed water filtration system is remarkably straightforward Multi-scene Application: As a necessity for outdoor water purification, the Burtrail Gravity Water Filter is applicable to camping, hiking, backpacking, emergency preparedness (rainstorms, floods, earthquakes, hurricane, etc.) to meet the emergency water demand in a variety of situations Portable and Lightweight: No cumbersome fittings and lightweight. Easy carrying survival water filtration system when putting all the parts in the organizer bag Burtrail gravity water filter is a portable and efficient water filtration system for camping, hiking and emergency preparedness. It uses a gravity system and water filter straw to purify water quality, making it easy to use and reliable in any scenario.The whole water filtration system it's made of durable and food-grade materials, this water purifier ensures that your water is healthy to drink, and easy to maintain, making it a reliable choice for any adventure. Whether you're out in the wilderness or facing a natural disaster, the Burtrail Gravity water filter is a must-have for anyone who wants to stay hydrated and healthy