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.
There is a very well accepted idea that we should drink about eight cups of water per day (two to three litres) in addition to our food and other drinks.here is no evidence that adding the eight cups of water to everything else you drink will do you any good and it could do you harm (American Journal of Physiological-Regulatory, Integrative and Comparative Physiology, November 2002, Drink at least eight glasses of water a day.