The Sawyer® Squeeze Water Filter is the lightest and most versatile filtration system on the market. The filter has a total field weight of 3 ounces and may be rolled up to occupy almost no space in your pack. The Sawyer Squeeze Water Filtration System includes three pouches 12-oz., 16-oz. and 32-oz. which can be reused. To use, simply fill up the pouch of your choice at the lake, stream, or river and screw the filter directly onto the pouch and squeeze the bag. Drink directly from the filter with its push-pull cap. Filter attaches to most threaded water bottles, including 2-liter bottles. Perfect for traveling abroad where tap and bottle water can't be trusted. In addition to the three lightweight collapsible pouches, the kit includes a Sawyer 0.1 Absolute Micron Hollow Fiber Membrane Screw On/Off Water Filter, a replaceable Pop-Up Drinking Spout, a Cleaning Syringe, Cleaning and Maintenance instructions. Made in USA.