There is a Barq's and Jackson Beverages connection, during Prohibition, that I don't know much about yet.
Prohibition in the United States was a nationwide constitutional ban on the production, importation, transportation, and sale of alcoholic beverages from 1920 to 1933. To stay in business, beer companies bottled non-alcoholic "near-beer" and soft drinks.
1931 Jackson Root Beer bottle on the left, 1935 Barq's Root Beer bottle on the right.