From the details page in the app:
-Walk into any participating Circle K store in the continental United States on 9/23/19
-Have the Circle K attendant scan your Monster Monday barcode provided by clicking the "Get Offer" button below
-Then have the Circle K attendant scan your 16 oz Monster Energy drink (applicable taxes may apply)
-That's it. Enjoy your Monster Energy drink courtesy of Boost Perks and have a great Monday!