It's like Dr. Pepper multiplied by awesome!
Also, I found this blurb on a vendor site while searching for this pic
"In 2001, Pibb Xtra was introduced as a bolder version of the original Mr. Pibb taste. Its bold taste and graphics appeal to young adults who are looking to get the most out of life and the most out of their soft drink. It appeals to teens who are just gaining independence from home and looking for things to call their own. The soft drink enables them to have an uninhibited, fun and unconventional attitude and touts the sweet, refreshing bold taste they need to express their independence."
HAHA, so apparently this soft drink is a required part of life.