The erstwhile donut chain is running a promotion for National Coffee Day on Sept. 29 where customers will receive a free medium iced or hot coffee with with any purchase.
But Dunkin' is far from the only restaurant offering a coffee deal on Friday.
Krispy KremeThe popular donut chain is pushing its "new and improved" beverage line by offering free medium hot or iced coffee, including espresso-based lattes, with no purchase necessary.
Tim Horton'sThe Canadian chain is giving a free iced or hot coffee to anyone who makes a purchase of at least $3.
Shipley Do-NutsThe chain with more than 340 locations nationwide is giving away a free medium hot or iced coffee when you make a purchase.
Persons:
Dunkin, Tim Horton's, Shipley
Organizations:
National, Nutty, CNBC