Oh, answer from the heavens to the existential question that's plagued mankind since the dawn of liquid, what, oh what, in all that is holy-regional-specificity do we call that most bubbly of beverages? Oh, map of the ages, slake my thirst for knowledge!

[1]

So yeah. Soda or Pop — or in a crazy Southern specialness that can't at all come from the fact that Coke is based there, Coke. What do you call it? This map will save you [2] from ever having that conversation again — though by all means use it as an icebreaker and then pop them (heh.) with your fizzy drink fountain of knowledge. Maps. Ah, refreshing.

Source [3]