Hydrate Glacier. HYDRATE is the first and only complete rehydration electrolyte powdered drink mix that contains 18 vitamins and minerals, but with zero sugar and only 5 calories. It also contains these immune boosting ingredients: Vitamin C, Vitamin D, Magnesium, Zinc, and Selenium. Great for helping to improve and maintain hydration before, during, and after exercise, while working or playing in the heat, or during travel. 16 Sticks, Adult.