FREE Sample of the New Dunkin’ Turbo CoffeeMarch 13, 2010 by Mitchell Wischmann This post may contain a link to an affiliate. See my disclosure policy for more information. Dunkin’ Donuts has a new FREE coffee sample available! Go here and click on the ‘FREE Sample’ tab to request a 1.1 oz sample of their new Dunkin’ Turbo coffee. Allow 6-8 weeks for delivery.