About This Universal Compatibility: Features a standard 42mm threaded opening, compatible with Befree and other common 42mm replacement filter cartridges. Easily convert this reservoir into a complete gravity-fed water filtration system Accurate Leakproof: Constructed with a double-welded sealing edge and side quilting to withstand high pressure and squeezing. The innovative twist-to-drink cap features an integrated valve—simply twist to open for a smooth sip, and twist again to close for an instant, spill-proof seal. Toss it in your pack with total confidence Premium Food-Grade TPU: Crafted from ultra-durable, food-grade TPU material that is 100% BPA-free. This safe and resilient construction ensures long-lasting performance and reliable leak prevention even under extreme conditions Ultra-Light & Collapsible: Weighing only 118g (4.2 oz), this 3L reservoir collapses down to a fraction of its size when empty. It's incredibly light and compact, making it the perfect minimalist companion for hiking, camping, and backpacking Rapid-Fill & Easy Hang: The wide-mouth design allows for quick and effortless filling and cleaning. The sliding buckle and hooked rope suspension system let you hang it from a tree, vehicle, or any high point, turning your drinking water setup into a convenient, hands-free gravity system Overview Brand : Burtrail Special Feature : Hangable, Leak Proof Product Dimensions : 6.3"L x 6.3"W x 18.5"H Material : TPU Capacity : 3 Liters Included Components : 3L gravity fed water bag, hooked rope Package Information : 3L Collapsible water bag Purification Method : Plastic, TPU Power Source : Gravity Fed Manufacturer : Burtrail