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 Institute of Medicine has determined how much water the average man or woman needs to drink to be healthy: Men -- The average man should drink 3.7 liters or 15 cups of water per day. Women -- The average woman should drink 2.7 liters or 11 cups of water per day. That's a lot more than the 8 cups that you're used to drinking! The good news is that you don't need to get all of your water just by drinking! The recommendations above is for total water intake, which means liquid in all of its forms.