Holds 22 fl oz. The HydraCoach is the world's first Interactive Water Bottle. It calculated your personal hydration needs, tracks your real-time fluid consumption, paces you throughout the day and motivates you to achieve and maintain optimal hydration. Doctors, nutritionist and fitness trainers all recommend that we drink more water yet there has never been a device to help us adhere to the expert's recommendations. The HydraCoach is the only product of its kind and a breakthrough in personal hydration monitoring. Easy set up and operation. Soft silicon mouth piece. Simple to clean and fill. Robust nylon finger ring. Durable polycarbonate bottle.