What: The convenience store chain is letting customers, once again, bring their own slurpee containers to fill up on the sweet slush. For $1.50, you can bring any receptacle of your choosing and fill it to the brim with your favorite flavor.
Get creative and share your cup with the hashtag #BYOCupDay.
Where: All 7-Eleven locations in the United States.
When: March 18 and March 19 between 11 am - 7 pm.