I think the "Pop" longitude and latitude coordinates have an overlay with the "Iced Tea vs. Sweet Tea zones. The breakfast, supper, and dinner ettiquite too. Amazingly too, all carbonated beverages in the south are called "Coke". I'll never forget being asked what kind of drink I wanted with my meal? I said "Coke" and the waitress said "what kind of coke?"
There is also a certain latitude of which yeast seems to have become extinct. One can only take so many soda bisquits.
I've never heard of this. So what do you say when you want a Coke?