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, an independent and non-profit scientific organization, says that men aged 19 and over should generally take in at least 3.7 liters of total water every day â about 15.6 cups a day. Women ages 19 and up should take in 2.7 liters of total water every day, which is about 11.4 cups a day. And if pregnant or breastfeeding, the recommendations go even higher, to 12.6 cups and 16 cups, respectively.