There's no question that 1966 was a big year. It was the year the Monkees (the group, not the animal) made their TV debut. Star Trek also aired for the first time, and the Fab Four played their final concert. But even more profound and pop culturally relevant? It was the year the Slurpee was born.

Yes, the Slurpee! The delicious, carbonated beverage you can only find at 7-Eleven stores across America debuted in 1966, and is now celebrating a milestone in July 2016. Now, 50 years later, the world is celebrating the happy accident that became a wildly popular treat.

The Coca-Cola Company has been a part of the Slurpee and 7-Eleven story since the beginning. Coke is always listed as one of the most popular Slurpee flavors. And this year, as part of the 50th anniversary celebration, a special Fanta flavor, Fanta Birthday Cake, will be available for a limited time at participating locations.

Sooooo, when can you get your hands on this special Fanta Slurpee? 7-Eleven and Slurpee plan on celebrating the big 5-0 with a massive birthday party. On July 11 (7/11, get it?), customers can visit stores for a free small Slurpee. Since 2002, it is estimated that 7-Eleven gives out close to 9 million Slurpee drinks on 7-Eleven Day each year. From birthday donuts, lollipops, cotton candy, marshmallow pops, candy straws to beach towels, socks and Slurpee party pic packs (complete with selfie-stick), 7-Eleven is taking the celebration beyond the Slurpee machine.

Then, from July 12-18, Slurpee fans who purchase seven Slurpee drinks and scan the 7-Eleven mobile app will receive 11 Slurpee drinks for FREE. The free Slurpee offer will automatically appear as a coupon in the “Scan and Save” section of the app. The 11 free Slurpee drink coupons must be redeemed by Aug. 31, 2016. That’s a whole lotta brainfreeze experience in one purchase.

You can only get all this Slurpee 50 goodness for a limited time. Visit to find out how the big day is being celebrated in your town.