MANGO | Reign Storm Mango is smooth and refreshing with the sweet taste of fresh exotic mango. CLEAN ENERGY | Reign Storm contains ZERO sugar, only 10 calories and caffeine from natural sources which will help give you a natural boost. PLANT BASED ENERGY | With Reign Storm, you can harness the power of great tasting clean energy, with no artificial colours or flavours and 140mg of plant-based caffeine, with better for you ingredients that nourish the body, mind and soul!