From the end of May until September, Arby’s customers who purchase a 44oz (!) drink will get a peel-off sticker with an Arby’s code. You can take that code to Arbys.com to find out if you have won a prize. The grand prize in the contest is a rock n’ roll boat cruise featuring Collective Soul. You can also win autographed guitars, MP3 players, and a Yahoo! Music song download.