Get a FREE Slush or Drink at Sonic!
Sonic is well-known for its delicious slushies.
Maybe it’s because they’re the perfect compliment to wash down their burgers. Either way, you can get a free medium slush or drink of your choice at Sonic with this offer. Get their mobile app if you don’t already have it and the freebie offer will be available in the app. Then all you have to decide is which flavor slush to get!