Edit:

From the Dr Pepper web site:

Q: Is Dr Pepper owned by a larger company? A: Yes. Along with a number of other great brands, Dr Pepper is a brand within the Dr Pepper Snapple Group (DPSG). DPSG is one of the largest producers of soft drinks and premium beverages in the Americas. DPSG's brand portfolio includes Snapple, Dr Pepper, 7UP, A&W Root Beer, Sunkist soda, Canada Dry, Hawaiian Punch, Schweppes, RC Cola, Diet Rite, Slush Puppie frozen drinks, Mott's Apple Juice, Clamato, Mr & Mrs T, Holland House mixers, Rose's, Mistic, Yoo-Hoo, Orangina, IBC, Stewart's, Nantucket Nectars and other well-known consumer brands.

Pretty sure Dr Pepper is a PepsiCo product....