It's July 11th or 7-Eleven, and it's officially Slurpee Day! For years, the convenience store has celebrated the date 7/11 by giving away free Slurpees. This year is no different. However, those in the know have been getting free Slurpees since July 1st. The deal started at the beginning of the month. It's ok. You can still get your free drink today. Download the 7-Eleven app, become a 7REWARDS member and get the free Slurpee coupon.