$2.99 Sonic Cheeseburger& Small Shake. * Offer includes single-patty SONIC Cheeseburger (approx. 1/4 lb. precooked) only. Excludes Master Shakes. Add-Ons and Add-Ins cost extra. Limit one with coupon. One coupon per visit. Please mention coupon when ordering. Not good in conjunction with Combos, Order Ahead, delivery or any other offers. Offer good only at participating SONIC Drive-Ins. No cash value. Copies, sale, or internet distribution or auction prohibited. TM & 2022 America's Drive-In Brand Properties LLC. HURRY! OFFER GOOD THROUGH JULY 8, 2022.