Here's a easy way to get UNLIMITED free slurpees throughout the whole month without having to download the app or register online:
When you go to pay, click on the touchscreen they have in front of the cashier and click on "Phone number" (or something like that), then put in ANY RANDOM PHONE NUMBER THAT YOU WANT - AS LONG AS IT IS 10 DIGITS (DOESEN'T NEED TO BE YOUR NUMBER). Then it will ask you for an email address. In the corner there is a button that says "skip". Click on that and VIOLA! Your slurpee should be free.
You basically just made a new 7-11 rewards account...
You can repeat this as many times as you like for the entire month!
I did it daily last year...
Ask your LOR regarding GEZEL AKUM, etc...