While supplies last, Big Gulp drink cups at 7-Eleven have a peel-off sticker for a Redbox code.
The back of the peel-off sticker says:
Enter this promo code at any Redbox location for a FREE 1-day DVD rental or towards a discount off of a Blu-ray or Video Game. Expires 10/31/16 11:59 p.m. 1 code/transaction. 1 time use. Payment card required. Charges apply for additional days. Can’t be combined. Subject to additional terms. Void where prohibited.