For those who have everything: The HydraCoach

last updated 10 January 2015

Everyone knows you’re supposed to stay hydrated before, during, and after a workout. HydraCoach—the world’s first interactive water bottle—calculates the amount of water your body needs and monitors exactly how much you consume. “Call it a coach-in-a-can.” Just plug in your weight, the expected duration of exercise, and such other “hydration factors” as heat and altitude. HydraCoach, developed in collaboration with CamelBak, will generate a “personal hydration goal” for your day’s activities and gently warn you if you’re beginning to run dry.

$30, hydracoach.com