Dunkin Donuts accidentally sent Chicago Blackhawks coffee cups to St. Louis before the teams began their round one series in the Stanley Cup playoffs.

The St. Louis Blues and the Chicago Blackhawks are bitter rivals.

KMOV.com

“That’s disgusting. They can’t do that here,” one Blues fan told KMOV.

Dunkin Donuts apologized for the mixup.

“Due to an untimely shipping error from the regional distribution center. Being a local business owner and fan of the hometown team, the franchisee plans to switch out the cups as soon as they receive a new shipment,” they said.

The Blues won Game 1 in overtime, 1-0, when a shot from David Backes deflected off of Blackhawks defenseman Trevor van Riemsdyk past Corey Crawford.

The teams face off in Game 2 Friday night at 7PM CT.