Drinking enough water each day is crucial for many reasons: to regulate body temperature, keep joints lubricated, prevent infections, deliver nutrients to cells, and keep organs functioning properly. Being well-hydrated also improves sleep quality, cognition, and mood.Experts recommend drinking roughly 11 cups of water per day for the average woman and 16 for men. And not all of those cups have to come from plain water; for example, some can come from water flavored with fruit or vegetables (watermelon, lemons, berries, or orange or cucumber slices). I have chosen to add watermelon to my Gerolsteiner to help with hydration and to add additional calcium and magnesium as well.