Established in 1953, SONIC Drive-in, a subsidiary of SONIC Corp., is one of the largest chains of drive-in restaurants in the United States. Based in Pueblo, Colo., the franchisee operates more than 3,500 chain outlets in 43 states. Serving nearly 3 million customers each day, the restaurant offers a variety of food items in the categories, such as burgers, coneys, chicken, snacks and sides, salads, kid's meal and breakfast items. Its specialty menu includes Toaster sandwiches, Ex-Long Chili Cheese Coneys, Footlong Quarter Pound, Tater Tots and hand-made Onion Rings. SONIC Drive-in offers a line-up of Fountain Favorites drinks, such as slushes, juices, teas, fruits and favors with more than 168,000 drink combinations. QSR Magazine has ranked SONIC No. 10 in the magazine's Top 50 QSR list based on system wide sales.