The company's cola brand took a pass on the Super Bowl last year (the ad dollars instead went to a community advocacy project dubbed Pepsi Refresh), but both Pepsi Max and Doritos will be there sometime after the kickoff at 6:30 p.m.

FORBES: The Super Bowl Ads You Can't Miss

Read Montague, a neuroscientist at Baylor College of Medicine in Houston, has demonstrated that subjects' brains register a preference for Coke or Pepsi that correlates with the product they choose in blind taste tests. (His study is not funded by the cola giants.) The brain of "Subject P" on the monitor in the Human Neuroimaging Lab, for instance, shows he is a Pepsi lover.

FORBES: Magazine Article