Platypus accessories are a key component of our modular designs, allowing customers to replace, upgrade or maximise the versatility of their Platypus product, or any other hydration system. The Bite Valve and Tube Insulator can be added to any existing Platypus hydration system to fend-off freeze-up in cold weather or to keep drinks cool in summer! This product is flexible, lightweight, durable and taste-free, Platypus is the modern way to keep hydrated during any outdoor activity.