The Sawyer Squeeze Water Filtration System is a 3 oz lifeline to clean drinking water thatll fit right in your pocket. A proven safeguard against unseen contaminants threatening to derail any camping trip. Remove99.99999% of bacteria and 99. 9999% ofprotozoa with 0.1-micron absolute filtration. Microplastics are filtered completely. The setup is simple. Fill either of the two 32 oz pouches included, attach, and then squeeze. This Sawyer filter is built with flexibility in mind as well. Use the included accessories to turn it into a gravity filter or an addition to your hydration pack. Expect a water filter built with you and your health in mind for those backcountry getaways and dubious spigots.