Mountain Dew is a citrus-flavored soft drink, made by the PepsiCo company. The drink has more caffeine (a stimulant) than other soft drinks like Pepsi and Coca-Cola. Mountain Dew is a carbonated soft drink brand produced and owned by PepsiCo. The original formula was invented in 1940 by Tennessee beverage bottlers Barney and Ally Hartman. A revised formula was created by Bill Bridgforth in 1958. The rights to this formula were obtained by the Tip Corporation of Marion, Virginia.