Small glass vessels in the form of an elongated flask as containers for wine samples, closed with a screw cap. They are also called "Wine in Tubes". The volume is usually 60 or 100 ml (one eighth of wine = 125 ml). Such vials are used by various wineries for the presentation of their product range. They are ideal for drinking by the glass or for professional tastings. They allow you to get to know the wines of a producer without having to open a whole bottle. They also make an original contribution to marketing as an attractive eye-catcher. The German winery Ress Balthasar (Rheingau), for example, offers wines in such vials. The Australian winery Penfolds markets a red wine made from Cabernet Sauvignon vines planted as early as 1885, which is bottled in an exclusive glass vial. See also under wine vessels.