To use the GU Roctane Energy Drink Mix, simply mix one serving with water according to the instructions on the package. It's great for athletes during long - distance events like road races, marathons, or triathlons. Just remember not to overdo it on the caffeine if you're sensitive to it. There's no special maintenance needed for this product, just keep it in a cool, dry place. Enjoy the energy boost and improved performance it provides!