For the price, you can get a Sonic Cheeseburger and a small Classic or Master Shake.
The Sonic Cheeseburger consists of a beef patty, American cheese, crinkle-cut pickles, chopped onions, shredded lettuce, tomatoes, and a choice of mustard, mayo, and/or ketchup on a toasted bun.
Current Classic and Master Shake varieties include:
- Vanilla
- Fresh Banana
- Caramel
- Chocolate
- Strawberry
- Hot Fudge
- Peanut Butter
- Holiday Mint
- Oreo Peanut Butter
- Oreo Chocolate
- Oreo Cheesecake
- Peanut Butter Fudge
- Strawberry Banana
- Strawberry Cheesecake
- Coconut Cream Pie
- Banana Cream Pie
- Cheesecake
Photo via Sonic.