One tube of Nuun Energy mango orange contains 10 tablets. Each tablet makes one 16oz sports drink, with optimal electrolytes, caffeine, and b vitamins. Nuun Energy keeps you hydrated and gives you a boost when you need it most. The caffeine helps to give your energy a lift, and b vitamins help your body to metabolize fuel efficiently to keep energy high with the same optimal electrolyte level you know and trust from Nuun Active. Nuun Energy will also keep you hydrated and cramps at bay. This product contains caffeine which may not be suitable for children. Please consult with your physician with any concerns before using this product.