One Bottle Hydration combines the convenience of your Camelbak with the versatility of your favorite bottle to revolutionize the way you drink from trail to summit to camp to home to vehicle. Thousands of hikers* all over the world use the One Bottle Hydration system to add a Camelbak-style tube and bite valve to their existing bottles, enjoying their water without dropping their packs while simultaneously avoiding the fuss of filling, cleaning, and drying their flexible bladders!