It is 7-11, which means you can get a free Slurpee at many participating outlets. From Mental Floss, here are 11 brain-freezing facts for Slurpee’s 50th birthday. One dude invented the ICEE and the Slurpee. And even he wishes he had invented Pokémon Go instead. (I’ve had the jingle “Seven Eleven’s Got Slurpee Rock Cups” stuck in my head since junior high.)