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.
Of this, they suggest that 70-80% of the daily water intake should come from drinks, and the remaining 20-30% should come from food. This is supported by the NHS who recommends that women should drink eight 200ml glasses and men should drink 10 200ml glasses of fluid per day NHS Choices: Water and drinks, April 2013. .