Sonic Drive-In: FREE Shake w/ Cheeseburger Or Hot Dog Purchase

FREE Shake w/ Burger Or Hot Dog Purchase

For a limited time, Sonic is offering a FREE small classic shake when you buy a Sonic Cheeseburger or Footlong Quarter Pound Coney – no coupon is needed. This promo cannot be combined with any other offers and is valid at participating locations only. Mention the offer when ordering. You can also get a Free Medium Slush when you download the SONIC App and create an account.