It’s that time of year again, when 7-Eleven celebrates its customers with free Slurpees on July 11. (7/11 – get it?) While I don’t encourage participating in 7-Eleven Day because of the Slurpee ingredients, there's no reason you can't make your own version, like this Watermelon Slushee made with fresh fruits, seltzer and sugar.

But I would like to encourage you to listen to this groovy 1970 song, “Dance the Slurp.” According to Priceonomics, it was created for a commercial and became a mainstream hit. “Dance the Slurp” was released as a promotional 45 rpm, given away at 7-Eleven stores.

If you're going to take part in Free Slurpee Day, I think you should play this song in the car on the way there. Then peel out of the parking lot, windows down, blaring “Dance the Slurp” as you slurp! (On second thought, don’t peel out. It’s Free Slurpee Day, and there are bound to be lots of people, including kids, in the parking lot. So just pretend you’re peeling out. But you can definitely do the rest.)

Priceonomics has the entire history of the Slurpee, and it’s an interesting one. Here are a few tidbits of Slurpee trivia.

  • The Icee and the Slurpee are the same. When 7-Eleven entered into a deal to have the machines in its stores, it gave the drink a different name.
  • The inventor of the process for making these drinks considered calling them “scoldasice.”
  • There have been 145 different Slurpee flavors over the years.
  • Winnepeg, Canada, is the “Slurpee Capital of the World,” and residents are known for mixing their Slurpees with alcohol. (Apparently port and a grape Slurpee are a classic pairing.)

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Robin Shreeves ( @rshreeves ) focuses on food from a family perspective from her home base in New Jersey.