Since Coke and Pepsi hold pouring rights on most college campuses, Dr Pepper booked a different entry. It partnered with chegg.com, the online textbook rental service, for an interactive brand campaign. Students designed Chegg boxes with Dr Pepper imagery, then asked friends to vote on Facebook and Twitter. The campaign clicked on 4,000 campuses; the top three designers won a MacPro - and the winning look will be printed on Chegg delivery boxes for the fall semester. The promotion delivered top marks: 19 million impressions.