"We never thought this day would come," Tony Jacobs, Dr Pepper's vice president of marketing, said in a statement. "But now that it's here, all we can say is: The Dr Pepper's on us."
Beginning Sunday at 12:01 a.m., coupons for a free 20-ounce soda will be available for 24 hours on Dr Pepper's Web site. They'll be honored until Feb. 28.
Dr Pepper is owned by Dr Pepper Snapple Group, Inc.