An animated character called Willy the Hillbilly once sold this citrusy soda brand
Marketers refer to the heavier sodas as "neon citrus," so named for ... intoned by 
the original cartoon character Willy the Hillbilly (Ya-hooo ... is a Southern brand 
called Kickapoo Joy Juice, named after the ... D9); Graph showing percentage 
change in total volume of Mountain Dew sold from 1987 to 1994.