 Restaurants usually use an electric appliance such as a heating cabinet or refrigerator for this.As many establishments use "oshibori" in large quantities, they often do not prepare them in the store, but instead employ a rental service which launders them, rolls them into the typical cylindrical shape, and delivers them already damp.These rental service companies frequently wrap each "oshibori" individually in a clear, lightweight plastic seal (polyethylene film), which can be easily broken and removed by the customer before using.