The Camelbak Cleaning Brush Kit is an innovative way to keep your delivery tube and reservoir clean. This brush set includes a reservoir brush and tube brush for a complete cleaning solution. The reservoir brush has a radial tip to prevent a puncture of the eservoir and cleans all sizes of CamelBak reservoirs. Cleaning your reservoir is easy, just insert the brush through the filling port. For larger reservoirs, collapse the top of the reservoir and insert your brush to reach the bottom. To clean the tube of the Camelbak reservoir, disconnect the tube from the reservoir and mouthpiece. Then run Tube Brush through tube from either end to clean entire length. The Camelbak Brushes last a long time. If the bristles of the brushes become irregular, just heat them up with an ordinary blow dryer. A dirty reservoir is not one you want to drink from. Scrub it clean with the Camelbak Brush Kit.