GU Hydration Drink Tabsare designed to keep you hydrated during any activity and in all conditions. Tablets are easily dissolved in 16 ounces of water, perfect for dropping into a sport bottle or bike bottle for hydration on-the-go. The light, effervescent tablets are also appropriate for everyday use, during training, travel, and hot weather, or anytime you need a hydration boost. The 12-tablet portable tubes easily fit in pockets, jerseys, and running belts. All flavors are caffeine-free and made with vegan ingredients.