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.
Water makes up 60 percent of our body weight, and can vary depending on size and gender (1). Hydration can come from water, food, or metabolic water production. Generally speaking, healthy adults should drink a minimum of 2 liters, or 8.5 cups, of water or fluid every day. However, that can vary greatly from person to person (1-4). While considering optimal hydration there are a few factors to keep in mind.