Dad's Root Beer was the first product to use the six pack format invented by the Atlanta Paper Company in the 1940s. Dad's also introduced the half-gallon bottle, becoming the first brand to market this size. Dad's was marketed as a family. "Junior" bottle size was the smallest, 7, 10 or 12 ounces. "Mama" was a quart bottle, and "Papa" was a half gallon bottle. (The image of the young boy featured on the "Junior" size bottle is Barney Berns' son, Gene Berns.) A common promotion in the 1940s was the 1 cent sale - purchase the Papa half gallon at regular price and get the Mama quart for 1 cent.