It all started at the Super Bowl, where a Bud Light commercial roasted Miller Lite and Coors Light for using corn syrup in their beer. In the one-minute clip, a king and his buds travel across land and sea to deliver a shipment of corn syrup to the Coors Light castle.

“Well, well, well,” says the Coors king as they arrive. “Looks like the corn syrup has come home to be brewed. To be clear, we brew Coors Light with corn syrup!”