I'm A Pink Fink Slurpee

Pink bubble letters on pink background. 

The Slurpee is a drink invented in 1965 by the 7-11 company, a chain convenience store. 7-11 would promote new flavors of the iced soft drink, Pink Fink being one of their many promotional flavors, by having their staff wear large buttons. Smaller buttons were given away to customers who participated in the promotion by drinking the seasonal flavor. 7-11 began licensing the frozen drink from the Icee Company in 1967 to expand their flavor selections.