Get ready for some brain freeze with this cool deal from 7-Eleven. On Friday, May 19 and Saturday, May 20, from 11 a.m. to 7 p.m. each day, bring your own cup to the convenience store and fill ‘er up with your favorite Slurpee flavor for just $1.50. (It’s the perfect opportunity to sip on its new flavor, Sour Patch Redberry. Personally, we love banana!) Before you start thinking about filling up a bucket, there are a few rules: 1.) Cup must fit through a 10″ hole upright; 2.) Cup must be food-safe clean; 3.) Cup must be watertight; and 4.) Limit one cup per person. Slurp away!