CamelBak: The high quality hydration bladder has been re-designed, making it even better. The new Camelbak Antidote Lite Reservoir has been re-imagined to offer even greater performance than before. Designed to fit into any hydration compatible pack, this durable bladder is easy to clean and well equipped for any adventure. Camelbak's patented Big Bite Valve is engineered with self-sealing silicone for a comfortable bite with no drips. HydroGuard technology inhibits the growth of bacteria on reservoir and tube surfaces.Does not protect user from bacteria or other disease-causing organisms. Please wash reservoir after each use.