Rugged, wide-mouth 2 liter bladder build with extra-durable TPU for fast, easy filling on any adventure, whether solo or with a crew. The 0.1 micron absolute hollow-fiber membrane filter removes 99.99999% of bacteria (e.g., salmonella, cholera, E. coli), 99.9999% of protozoa (like giardia and cryptosporidium), and 100% of microplastics. Paired with a durable, BPA-free, FDA-approved 2-liter TPU bladder with a wide mouth for easy filling, this system is both effective and convenient. The reusable Sawyer Squeeze Filter lasts up to 100,000 gallons, with thick fiber walls that enable rigorous backwashing. Weighing under 6 ounces, the system includes a cleaning coupling and plunger. Every Sawyer Filter is triple-tested for safety and can function as a squeeze filter or in a gravity setup. Kit IncludesA Sawyer SqueezeCnoc Premium 2 Liter BladderCleaning CouplingSyringe