I remember one of these coolers from the last job I worked! Let's just say that before they called me "Water Cooler Chris" I had a more sugary, carbonated nick name. Also, there was a lot more of me to go around.
Our office has about six choices of tea: Three black teas, one green tea, and two mint teas. The black teas run out first, and when they're gone, everyone gripes about it and grimaces whenever they slurp their insufferably sweetened tea. Once I saw someone crying in the corner.