Do the Dew
My personal favorite soft drink (Mountain Dew) was invented right here, in east Tennessee, some 60 years ago. The trademark was awarded on this day, November 12th, 1948, to the Hartman brothers of Knoxville (who invented the drink as a mixer for whiskey).
Pepsi-Cola bought the franchise in 1964, and today there are nearly a dozen flavors and several brand varieties. Knoxville Trivia Blog has a great timeline on the Dew's evolution (including early marketing techniques to correlate the drink to Appalachia-distilled Moonshine), and even Wikipedia has a page on the drink.