While water is essential for staying hydrated, some drinks may actually be even more effective at keeping you hydrated. Hydration is key to sustaining energy, regulating body temperature, keeping joints mobile, and allowing the body to flush out toxins and waste. Several studies have shown that milk can be even more hydrating than water or sports drinks, as it contains plenty of natural electrolytes, carbohydrates, and protein. A large, warm mug of dairy milk before bed can help keep you hydrated after dinner and may also contain properties that help you settle into sleep. Orange juice may also be more hydrating than water, as 100% orange juice is around 90% water and contains natural electrolytes such as potassium. Orange juice, especially fortified varieties, also contains other nutrients that are essential for fluid balance and hydration, including magnesium, calcium, and vitamin D. Finally, electrolyte drinks containing sodium and glucose can work together to increase fluid absorption, making them a better option than water when it comes to rehydration.