Next time you’re playing a game, hiking, working out at the gym or going for a walk, think about vacuum-insulated water bottles. They can boost hydration by keeping water cold and refreshing for up to 24 hours, and they’ll keep hot drinks hot for up to 5–6 hours. The bottles work this magic by including two chambers: a water compartment and surrounding vacuum-channel insulation. Meeting requirements for style, function and eco-friendliness, these vacuum-insulated water bottles offer a fun, effective way to hydrate.