The Sawyer Squeezable Filter Pouch Multi-Packs include replacement pouches for the Sawyer Squeeze Water Filter System in 16-, 32, and 64-ounce capacities. These Sawyer pouches can be filled in lakes or rivers, or under faucets. They attach directly to the tapered Sawyer filter to filter the drinking water. These pouches can be collapsed and rolled up for portability. Compatible with Sawyer Mini and Saywer PointOne water filters. Since 1984, Sawyer Products has offered the best, most technologically advanced solutions for protection against sun, bugs, water, and injuries -- everything from first aid kits developed for wilderness to point-of-use water filters that filter contaminated water to levels cleaner than U.S. bottled water.