These small bottles made of glass or pottery originally contained samples of alcohol. They came into being towards the end of the 19th century, when the first large commercial distilleries opened. They were given by salesmen to prospective clients and were produced in the same shape and style as the larger bottles sold to customers. Over the years these promotional mini-bottles became used as goods in their own right on trains, airplanes, hotels etc. There is an active band of collectors for these bottles, which come in all sorts of shapes and sizes. In France, many of these were produced by firms such as Denbac in Vierzon and Revol in Saint Uze.