Tomorrow’s a top down, wind in your hair, ½ price Cheeseburger in hand kind of day. Roll through for SONIC’s Burger Bash. 🙏 Single-patty cheeseburgers only. Tax not included. Add-ons cost extra. Cannot be combined with other offers. Offer valid 07/21/16 at participating SONIC Drive-Ins while supplies last. #SONIC #Cheeseburger #🍔 #BurgerBash