Who would turn down a free beverage from a drive-in restaurant? No one, it’s FREE!
To get this offer, simply download the Sonic Drive-In App from the Google Play Store or Apple’s App Store. Now you have it. Nothing else is required. You get rewarded just by opening it up! Unlike the Steak ‘n Shake offer, you have the choice of receiving either a medium slush or a medium drink free of charge.
Not only do you get one of those, but every time you “order ahead” using their app Sonic will let you get drinks and slushies for 50% off every single time. You can also use the app to “personalize every order just the way you like, according to their website.
Learn more about the Sonic App on their official page.