No need to hang your head in shame if your hydration bladder is still filled with water from last month's camping trip; Platypus is here to the rescue with its Reservoir Cleaning Kit. The big brush cleans out the reservoir itself, while the tiny brush scrubs out the drinking tube. Here's a tip if it's super-funky: fill the whole deal with water, then add a denture tablet. Wait fifteen, then scrub and rinse approx. one zillion times until the reservoir is effectively de-funked.