The Sawyer Cleaning Coupling offers an alternative way to clean your Sawyer Squeeze Filter, Micro Squeeze, or dual-threaded MINI filter using a standard plastic bottle. Simply remove the cap from your filter, attach the coupling, then screw the other side of the coupling onto a standard plastic water or soda bottle (28mm thread) filled with clean, filtered water. Once attached, you can forcefully squeeze the bottle to backwash and clean your filter. Repeat as necessary until the water comes through clear and easy. Since 1984, Sawyer has used technological advancements to create products that keep you outdoors — from the backcountry to the backyard — including insect repellents for both skin and clothing, water filters for camping and emergencies, and sun protection.