The KOR ONE Hydration Vessel is unique and popping up everywhere. I actually bought this water bottle hydration vessel a while ago but it broke at the behest of my roommate. The vessel is fairly strong but using a hinge creates a point of weakness unexperienced by Nalgene and other brands; additionally, the vessel arrives seemingly larger in dimension than it appears on screen. Nonetheless, it's an eye catcher that serves it's dual purpose of hydration + design and receives a warm recommendation.
Props to uncrate.com where I originally saw the vessel.