Get free coffee from Dunkin' Donuts this National Coffee Day

KNOXVILLE, Tenn. (WVLT) -- Dunkin' Donuts is offering guests a free medium-sized hot coffee with the purchase of a medium, large or extra large cup of hot coffee on Friday, Sept. 29, in celebration of National Coffee Day.

For National Coffee Day 2017, Dunkin' Donuts is celebrating the tastes of autumn with an array of coffees that feature fall flavors. In addition to pumpkin flavored hot and iced coffees and lattes, the chain introduced Maple Pecan flavored coffees and lattes this year. The chain showcased the new flavor as a "sweet and nutty taste for an exciting way to stay fueled for fall."

Dunkin' Donuts sells more than 1.9 billion cups of hot and iced coffee globally every year.