Every year, July 11 marks the day that the world’s No. 1 convenience retailer observes its birthday and other company milestones. 7‑Eleven introduced its iconic frozen carbonated beverage in 1966, and it was an immediate hit. . . . The retailer started the free Slurpee drink birthday tradition in 2002.
Generally, it is one small Slurpee/person and you have to bring your own cup.