Faygo was founded in Detroit, Michigan, in November 1907, as Feigenson Brothers Bottle Works by Russian baker immigrants Ben and Perry Feigenson. The original flavors of Faygo (fruit punch, strawberry, and grape) were based on cake frosting recipes used by the Feigensons in Russia. Initially, the brothers used a horse-drawn wagon for deliveries and lived above the bottling plant.
The business grew over the next ten years. The Feigensons were able to purchase houses, hire their first employee, and a second wagon and horse for deliveries. More flavors were added including Sassafras Soda and Lithiated Lemon. They built a new plant due to their success on Beaubien Street in Detroit.
In 1921 as the company expanded, they decided the brand name "Feigenson Brothers" was too long and changed it to Faygo. The brothers bought their first delivery truck in 1922, and started home deliveries the following year. The company opened its currently operating bottling plant in 1935 on Gratiot Avenue in Detroit. The company briefly entered into beer productions.
Because the drink had a limited shelf life, the company only sold its products in Michigan until the late 1950s. Company chemists later resolved this issue by installing a filtration system to remove impurities from the manufacturing plant's water system. In the 1960s, the soda's regional popularity expanded when the company began advertising during broadcasts of Detroit Tigers games. This increased company sales from $6 million in 1966 to $20.4 million in 1971.
The company introduced a low-calorie version in the 1960s called Ohana. Faygo introduced a diet version of its line in the 1960s, this sub-line soon becomes a majority of company sales.
Faygo expanded in 1996 with a non-carbonated drink line, Ohana, which included punches, iced tea and lemonade. Faygo was also ranked the best-tasting American root beer in the September 2009 issue of Bon Appétit.
According to en.wikipedia