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. 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.