Celebrate Friday with a freebie.

As part of a special nationwide tasting event, Dunkin' Donuts is offering complimentary 3.5-ounce cold brew coffee samples from 10 a.m.-2 p.m. today at participating locations. The brew is prepared in small batches with a blend of coffee in cold water for 12 hours to extract a sweeter flavor reminiscent of dark chocolate.

Various locations, dunkindonuts.com .