The Sawyer SP113 Squeezable 32 oz. Filter Pouch 3 Pack is a three pack of 32 ounce replacement pouches for the Sawyer Squeeze Water Filter System. These Sawyer pouches can be filled in lakes or rivers, or under faucets. The Sawyer SP113 attaches directly to the tapered Sawyer filter to filter the drinking water. These pouches can be collapsed and rolled up for portability.