The flood of Ironman 2 movie tie-ins probably means some nice spending money for Marvel Comics (and Disney, who now owns them). Somehow though, on this case box of 12 cans of Dr.Pepper, the artwork indicates Tony Stark is about to hose down a villain with a carbonated spray.
In the first Ironman film, wasn't Tony Stark particularly interested in consuming a Burger King hamburger?

In the days when I was reading the monthly Marvel Ironman book, Tony Stark was drinking something a lot of problematic than Dr. Pepper...
Movie and comic book tie-ins: Wolverine Happy Meal Action Figure
Photo from display at the Ironbridge Road Food Lion, near Richmond Virginia
Vaguely related: Jack Kirby's Captain American Shorts at Walmart
Also; Batman Movie tie-ins