7-Eleven kicks off the “Hundred Days of Summer” with a cool deal for Slurpee fans. Today, Monday, May 30, the ubiquitous convenience store is offering a buy-one-get-one FREE Slurpee (of equal or lesser value.) Now, we noticed lots of comments on its Facebook page from customers who had trouble finding a participating location. (In addition, it seems many employees were unaware of the promo.) Therefore, we encourage you to ask (or call ahead) before you start filling your Slurpee cup. If there’s any confusion, here’s a link to the official press release for reference. From our experience regarding promos, the biggest issue always seems to be ill-informed employees. However, many 7-Eleven locations are franchise-owned, so participation may (and probably will) vary.