Pepsi Challenge - The Pepsy Challenge

Pepsy knew from their research that people preferred pepsy over coke in blind taste tests. They set up booths and asked real people to sip two hidden colas and pick their favorite. In commercial after commercial, viewers watched real people sip both colas then proclaimed their preference for pepsy. John scully, the president of pepsy at the time, said of the campaign, never before had comparative advertising had such spontaneity and believability.