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.
The typical U.S. adult downs about four cups a day, which is shy of the Institute of Medicine's recommendation to drink about three liters of fluid for men and 2.2 liters for women. But others disagree with this assessment -- if that's the amount of water a person naturally drinks in response to thirst, that's fine.