Ollie [ol-lie] as a boys' name (also used less generally as girls' name Ollie) is of Latin origin, and Ollie means olive tree. Ollie is a version of Oliver (Latin). Associated with: tree.
The Takeaway. On average men need 3.7 liters of fluids per day, and women need 2.7 liters. All fluids count, including milk, juice, coffee, tea, and even water-rich foods. Thirst and urine color might be better guidelines for staying hydrated. Weather, activity level, illness, and age can all impact water needs.
Keep Hydrated and Healthy. Every system in your body requires water to function properly, according to the Mayo Clinic, as the fluid makes up 60 percent of your body weight. The Institute of Medicine recommends that men drink 13 cups, or 3 liters, of water a day, and that women drink 9 cups a day, or 2.2 liters. Some people consider plain water to be boring and tasteless, finding that the carbonation in sparkling water is more interesting and filling because of the bubbles.