Minnesota fans looking to cheer themselves up with a cheeseburger following the Vikings' 38-7 loss to the Seattle Seahawks on Sunday were in for a bit of a shock this week, as one Minneapolis fast food restaurant was inadvertently rubbing a hefty dose of salt in the wound.

At least one Minneapolis-area McDonald's location appears to be selling Green Bay Packers-branded cups in an apparent marketing mix-up that caught the eye of the Rochester Post-Bulletin's Brett Boese.

Boese posted a photo of the offending drinkware to Twitter, seemingly confirming the national fast food chain's McBetrayal.

However, according to Michael Rand of the Star Tribune, who contacted the undisclosed McDonald's location, the cup mix-up was a simple shipping error.

The silver lining for Vikings fans, who saw their team get blown out at home, is they were able to take advantage of the store's offer for a free sandwich since the Packers won their game this past week.

We're not sure if that's enough payment for such a gaffe. Can a burger heal a wound from a knife in the back?

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