Your body needs from 1.5 to 2 liters of water daily since it contains 70% of water and always needs a refill. Drink the recommended amount of water through the entire day. According to your weight, you should drink 0.3 liters per 10 kilograms.
You should drink sparkling water if you are stressed or tired, since the carbon dioxide, or more precisely its component hydrate carbonate, contained in sparkling water helps to balance the bases and acids in your body. You should drink regular water if you suffer from stomach problems, since the carbon dioxide can increase the acids in your body.