I get questions about Dr. Pepper, Pepsi, Coca Cola, Dr. Slice, and Mr. Pibb all the time. For the record, here's the deal.
Dr. Pepper is a separate company from Coca Cola and Pepsi.
Dr. Pepper makes agreements to bottle and sell Dr. Pepper in areas sometimes with Coca Cola and sometimes with Pepsi.
Mr. Pibb is a Coke product that is found in towns where Coke does not distribute Dr. Pepper.
Dr. Slice is a Pepsi product that is found in towns where Pepsi does not distribute Dr. Pepper.