Like a full moon, 7-Eleven’s Slurpee Bring Your Own Cup Day draws a certain kind of crazy out of the fabric of the universe. From 11 a.m. to 7 p.m. today and tomorrow, customers can fill a receptacle of their choosing with any Slurpee flavor for $1.50. Although the convenience chain puts some rules in place regarding the dimensions and qualities of the container, guests certainly push the limit every year. The wacky Slurpee delivery methods create a social media gold mine and remind customers that 7-Eleven knows how to cut loose. So grab the nearest nonporous vessel, and gulp down these deliciously (or deliriously) creative cups.