A cruet is, essentially, a small bottle or vessel with an integral narrow neck and a lip or spout and a stopper. Cruets are now almost entirely related to food and cookery, containing oils and vinegars for use in the kitchen or at the table. They may be anything from crude earthenware to elaborate crystal but will invariably be made of materials which will not be effected by the contents. Cruet sets for the table will be likely to include containers for salt and pepper and they may be highly decorated for formal dining.