Got an ad in the mailbox yesterday with the following information:
Free 16oz. Iced Coffee - Tuesday, May 11 @ participating locations only
Text ICED to 386546 to get a mobile reminder on Free Iced Coffee Day!
I know that the link isn't to the deal, but the ad is official. If I could post pictures, I'd add the picture of the ad. Fine print says: taxes not included, price & participation may vary.