7-Eleven is kicking-off summer by giving away FREE slurpees to celebrate Slurpee Lite, a new brand of sugar-free flavors that contains 50% fewer calories but with the same great taste! This new sugar-free slurpee is flavored by Fanta. 7-Eleven is celebrating the launch of Slurpee Lite (and kicking-off summer) with SlurpFREE Day. On May 23, guests from coast to coast are invited to flavor their summer by visiting participating 7-Eleven stores from 11:00am to 7:00pm to slurp down a FREE 7.11 ounce Slurpee drink. So stay cool and keep the calorie of your waistline this summer!