Tray is a common restaurant staple, as it is used to transport food from the kitchen to the dining area. It is also used to serve multiple dishes at once, making it an efficient way to serve customers. Cutlery is another restaurant staple, as it is necessary for customers to eat their meals. Napkins are also a restaurant staple, as they provide a convenient way to clean up messes and spills. Lastly, condiments are a restaurant staple, as they provide flavor and enhance the overall dining experience.