Dunkin' has teamed up with Ripple Street to find testers for its Refreshers Drink Mix. Apply through the Ripple Street event page and, if you're selected as a Chatterbuy participant, you'll receive Dunkin' Refreshers Drink Mix free to try at home in exchange for your honest feedback and reviews. This is an apply-to-test offer — applying doesn't guarantee selection, and no purchase is necessary to apply.