The slogan used to be, "Have a Coke and a smile."
For a while, though, it was "Have a Coke and a couple Michigan football tickets" on Monday.
Michigan has struggled to sell tickets to home games this season in part because of an unattractive home schedule and also because the team, now 2-2, was coming off a 7-6 season in 2013.
The athletic department has tried a number of promotions to sell tickets, including Groupon and Living Social.
Michigan has announced a crowd of more than 100,000 for both home games this season, despite the fact there have been large sections of empty seats.
On Monday, the Michigan Daily, UM's student newspaper, reported a promotion offering two free Michigan football tickets to Saturday's Minnesota game with the purchase of any two Coca-Cola products. The advertisement appeared in a store in the Michigan student union.
The tickets offered have a face value of $75.
Michigan released a statement in the evening saying there was a "miscommunication" involving the offer.
"Coke is a great partner of ours and had purchased a limited block of tickets for the Minnesota game for a Coke retail activation aimed at Michigan students," the statement read. "Due to a miscommunication in the approval process, this promotion should not have run as is. As a result, it is being pulled immediately. However, all purchases to date will be honored by Coke."