Dunkin Donuts' National Donut Day offer: Free donut, but you have to purchase a beverage

This Friday, June 3, in honor of National Donut Day, Dunkin Donuts will offer customers a free donut at participating stores. 

According to their press release, customers can visit a participating Dunkin' Donuts and receive a free donut of their choice with the purchase of a beverage (excluding bottled cooler beverages).  This offer is while supplies last, so get there early and, I guess, come thirsty!