Oxigen - Formula Four Water Shot - 30 Count (30 x 0.5 Fl oz. (15mL)) During workouts. During times of extra stress. Replenish and restore whenever, wherever. Give your body a super boost of pure, bioavailable oxygen with Oxigen shots. A highly concentrated serving designed to give your brain and body an instant lift and get you back on track, ASAP. Power up when you need to finish strong.