In the context of the input sentence, determine the relationship between 'Diet Pepsi' and 'PepsiCo'.
Options: publisher, manufacturer, distributed by, chairperson

SCOTTSDALE, Arizona (Reuters) - PepsiCo Inc. ( PEP.N ) plans to introduce a new, energized version of Diet Pepsi that includes more caffeine, as well as ginseng, a PepsiCo spokesman confirmed on Wednesday.
manufacturer