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Sonic Drive-In: FREE Medium Slush (Mobile Users)

Screen Shot 2016-04-26 at 7.37.16 AMThis yummy freebie is still available! For a limited time only, Sonic is offering you a FREE Medium Slush offer when you download the Sonic App (iOS or Android) and create an account! Once you create an account on the app, you’ll get the offer added to your account. It is valid for one month after you download the app.

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