Breakdown Have you ever set your pack down for a break during a long hike in or pack out and then realized that your hydration mouth piece fell into the dirt? Now you have to use your precious drinking water to clean the mouth piece just to take a drink. Instead of dealing with that you can keep your hydration mouth piece clean by using the Platypus Bite Valve Cover. Fits all Platypus Bite valves by removing the bite valve and then installing the protection cover. This product has a limited lifetime warranty from the manufacturer.