Dunkin’ Donuts introduces a new Chocolate Chip Cookie, summer Coolatta varieties and two new donuts Guests can try new Sour Apple Coolatta® Frozen Beverage flavor, and enjoy any small Dunkin’ Donuts Coolatta for the special price of $1.99 through May CANTON, MA, 2016-May-05 — /EPR Retail News/ — Welcoming the warm weather in May at Dunkin’ Donuts is as…