Disposable tableware was a key part of the business strategy of chain fast food restaurants in the US.[5] In order for the business model to work, fast food chains found it economically advantageous to convince consumers through advertising campaigns to carry their own tableware to a waste bins, in order to avoid labor expenses incurred in clearing tables.[6] By establishing a custom in which customers are encouraged to carry disposables, some of the internal costs of the disposable tableware can be offset.