Nikon wrote...
So this is a regional thing. People from all over call it by a different name. My family always called it "soda". What about you all?
I'm not sure how regional it is, but growing up I have always referred to it as Pop ...Pop i pre-flavored and canned or bottled.
Soda is "Unflavored" carbonated water that is flavored for you at a fountain, you can mix and match the flavors.
I am sure most people on this board today have never actually been to a Soda Fountain, but those who have know what I am talking about. One of my Uncles was even a Soda Jerk, way back in the day.