The Sawyer Micro Squeeze Water Filtration System will give you clean and safe drinking water wherever you roam. It is ultra-compact, lightweight, and reusable. With a total field weight of 2 ounces, this tiny filter fits in the palm of your hand but is powerful enough filter to 99.99% of bacteria and protozoa and 100% of micro-plastics. FeaturesWorks for up to 100,000 gallonsIncludes 32 oz. collapsible pouch, backwashing plunger, cleaning coupling, spare gasket, and drinking strawBest used when hiking and backpacking