No, I'm not particularly sporty <a href=" https://www.exotica.at/what-is-the-dosage-for-ibuprofen ">is ibuprofen or acetaminophen better for fever</a> This annual promotion apparently really works for 7-Eleven. Slurpee sales, as well as sales of other 7-Eleven items, spike July 11 each year, Time.com reports. The free slurpee draws customers into the store on a grand scale, and people tend to buy small snacks to go with their free drinks. And, in many cases, the small taste of Slurpee has them coming back for a larger size.