I’m just NOT even going to tell my son about this one. The results cold be quite disastrous. I’ll tell you guys, though, but you have to keep it a secret from him! August 18th & 19th is Bring Your Own Cup Day at 7-Eleven! That means that you can bring in almost ANY cup and fill it with a Slurpee for only $1.50! This isn’t QUITE the free for all that it sounds like, though. These party poopers still have a few rules. Your cup must be clean, food-safe, watertight, and no larger than 10 inches in diameter. So, those of you with 5 gallon pails or baby pools, NONE for YOU!