Platypus premium hydration system is now more durable than ever and loaded with improved features, like our new easy-to-clean wide-mouth SlideLock clsure with secondary reinforcement so you know it is sealed securely, and a quick disconect valve for removing the reservoir from a pack without re-routing the hose. Other upgrades include a redsigned, easy to use shutoff valve and a softer, more flexible, but still taste-free reservoir.