Very Versatile: This gravity fed water bag is compatible with SP128 Mini, SP129 Squeeze, Micro Squeeze and other common brands water filter straw. Make your water filter straw into an outdoor gravity works water filtration system High-Quality Materials: This 2 Gal gravity water bag is made of Food-Grade TPU materials,BPA-free,safe and ultra-durable material to ensure safe and water leakage prevention all the time Large Capacity: Whole body edge of this 8L water bag adopts a double soldering sealing side quilting design to withstand a large degree of squeezing. When the water pipe is inserted, it can be auto-locked fast and will not loose Quick Water Filling: Wide mouth design makes the water filling and flushing process easy and fast. Adjustable Strap and cutable hose,making your outdoor drinking water more convenient What's in Box: 8L Gravity water bag, Adjustable Strap, Connecting Hose, Hose Flow Regulator, Product Manual, Mesh Storage Bag Our Burtrail 8L ultra gravity fed water bag is compatible with SP128 Mini, SP129 Squeeze, Micro Squeeze and other common brands water filter straw. Reliable alternative to the original dirty water bag, wide mouth design makes the water filling and flushing process easy and fast. You can cut the hose to the length you need, then can be used connect with the filter straw. Using the camping rope to hang the water bag high up, than you'll get a gravity works water filtration system. This water bag is made of food-grade TPU materials, it's durable, lightweight, foldable, and leak-proof, providing a 8L large capacity, meet the daily water needs of personal and groups. The reliable quality of TPU compared to standard PE material ensures better durability and resistance to leakage, making it an ideal choice for outdoor enthusiasts.