Water Requirements

[SecretPrepper]

http://www.bbc.co.uk/news/magazine-24464774
I thought this was an interesting article about the drinking X amount of water a day.
From my own observations in my office where we have around 12 people, from 7 am to 6 pm we drink about 18.5 liters (sometimes less) that is from just talking on the phone with very little physical activity. A lot is used by the tea and coffee drinkers but we all have little plastic cups for the water cooler. Some of us have snacks like cupper soup and pot noodles that also take up water.

Does anyone else notice how much water they drink a day?