Dunkin’ is celebrating National Coffee Day in a big way next week with a special coffee offer. All day on Wednesday, September 29, DD Perks loyalty members can get a free medium hot or iced coffee with any purchase.

This offer includes Dunkin’s Original Blend or Dunkin’s Limited Batch Series coffees, 100% Guatemalan Hot Coffee or Dunkin’ Midnight Hot Coffee. Dunkin’ loyalty members can pair their free coffee with a purchase of one of the latest fall items, including a Pumpkin Donut, Pumpkin Muffin or Apple Cider Donut.

“We love our loyal DD Perks members, and what better way to say thank you than with a free coffee offer for National Coffee Day?” says Joanna Bonder, director, Dunkin’ Loyalty. “Be sure to sign up for DD Perks so you can enjoy this perk, and all of the amazing offers we provide our loyal members 365 days a year.”

DD Perks members earn five points for every dollar they spend at Dunkin' on qualifying purchases, and once 200 points are accrued, they receive a free beverage reward that can be used to get a free drink at participating Dunkin' restaurants.