A) Dr. Pemberton did put coke in the original Coca-Cola, without fanfare since for the next 30 years or so heroin, cocaine, hashish, opium and other fiendish delights were available at corner drugstores and Good For What Ails You, not prescribed.
B) I have three comments about the map- 1) cool that They did a survey 2) 'Respondants'*? Cirrhusly*? 3) the map is 'based upon' the respondents? That's either macabre (sari no agave/ague) or a massive human-pixel project!
C) I grew up on 'pop' and not only does it round out those Shasta jingles quite ably, but is the distinct household product. I support linguistic orthogony*! That is to say, TONIC is most popularly a hair solution- taken! Soda is something you bake with. Pop has no competition.