Oil and vinegar cruets can come individually or in pairs. These bottles provide an easy way of dispensing olive oil, vinegar, balsamic vinegar or other dressing. These are popular additions when serving salads, fish and chips, bread or even sandwiches. They come in sizes of four to twelve ounces and are typically made of glass. For a fancier look, choose cruets that come with cork or glass stoppers rather than the metal caps. These look pretty on the table top and add a sense of sophistication to your dinnerware.