Does "Coke" Have a Hold on the South?

Some product names come to refer to more than just the original product. People often say Kleenex for any brand of facial tissue, Band-Aid for any brand of adhesive strips, and Xerox for any type of copier. Now this map from Tom McMahon (based on the statistics found here) shows that in most of the South, people refer use Coke to refer to any coke-like softdrink (as opposed to using pop or soda). Both states I have lived in – KY and Florida, use coke, which probably explains why I would say "I need a coke" when I really just mean I need a soft drink. Interesting. I would love to see the correlation between this and Coke sales vs. other soft drink sales in each state.

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