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.
Harvard recommends drinking 30 to 50 ounces a day, which is equivalent to approximately four to six glasses of water. However, the team isnât just recommending water to drink at this optimal standard, but fluids in general to aid in hydration. Even certain foods like watermelon, lettuce, spinach, and soups provide the body with fluids that can work in tandem with water to retain and process a healthy amount of water.