Dr. Pepper is distributed by Coke in some states/countries, Pepsi in others, and by its own distribution network in like 30 US states. A friend likened it, not without a certain verisimilitude, to the result of the Treaty of Tordesillas in 1494.

The Dr Pepper/Coke agreement was terminated this year.

https://finance.yahoo.com/news/dr-pepper-end-partnership-cok...