The real divisions are between pop people, soda people and coke people.
As with many things, I’m a liminal person. I used to say “coke”, but switched to the second favorite around here (you can see it on the map), which is “soda”, because “coke” is often confusing. I’ve almost completely scrubbed “coke” out of my vocabulary. What started off as an inclination towards clarity probably is just further evidence that I’m the Librul Elite.