From a purely nutritional point of view, drinking water isn't necessary to stay hydrated, but it's better than unhealthy options like sweetened soda or fruit juice, explains Dr. Hugh Butler.
Regarding the common belief that drinking caffeine or alcohol dehydrates us, Dr. Töpf says the effect is minimal.
He also explained that water can be obtained from what we eat, as fluid-rich foods and meals such as fruits and vegetables, soups and sauces contribute to water intake.