to back up traffic when a customer used the roadside pumps. The curbside filling station was the first type of business to use the actual term "filling station". Other types of gas stations evolved such as the house or cottage type, the house and canopy, the house and bays, and the oblong box type. Examples of extant filling stations along Route 66 in Illinois can be found in varying states of disrepair, and a few have been fully restored. Restaurants In the early years of Route 66, many motorists brought their own food along with them and cooked it on the road. Constrained by tight finances and a mistrust of the unknown quality of road food, these earliest travelers were often reluctant to eat out. By the 1930s, this attitude had eased somewhat, and more motorists were eating out along the road. As drivers and automobiles on the road increased, so too did opportunities for fast food. One pioneer in this field was the White Castle chain, founded in 1921; the oldest White Castle restaurant on Route 66 is still in business in Berwyn. The road food trend was aided by entrepreneurs such as Howard Johnson who provided predictable, simple dishes—comfort food for the weary traveler. Many of the first roadside cafés were part of motor camp complexes, but others, such as Johnson's started explicitly as cafes and evolved further from there. Large companies, such as Johnson's, or the Steak 'n Shake chain which began in Normal and was based on the pioneering idea of curbside service at the car, enjoyed success alongside what were mostly "mom-and pop" eateries dotting the Mother Road. Some locations along Route 66 in Illinois became known for their cuisine. One example is the state capital, Springfield. The city has long had an affiliation with food. The corn dog on a stick was invented in the city under the name "Cozy Dog", although there is some debate to the actual origin of the popular snack. The Cozy Dog Drive In has been a Springfield Route 66 staple since 1950. One of the first U.S. drive-thru restaurant windows is still in operation in Springfield on Route 66 at the Maid-Rite Sandwich Shop. The oldest restaurant still in operation along the entire stretch of US 66, nationwide, is the Ariston Café in Litchfield. The Ariston is an excellent example of the type of mom and pop operation