Free Swirl Shake w/Roastburger Purchase This post may contain affiliate links. Please see my full disclosure policy for details. May 26, 2009 26 May Pin0Share0TweetGoogle+0shares Right now, you can get a Free Swirl Shake with a Roastburger purchase at Arby’s. The coupon link is here and expires on June 7. Normal caveat here — be sure to ask if your location will accept the coupon before you use it!