مياه معدنية
The mineral water sources are marketed by the firm of "Kohlensäurewerk Hölle Dr. Fritz Wiede GmbH &amp; Co.". Originally only the carbonic acid from the mineral water was given to breweries. Later the mineral water was bottled for consumption. The production of carbonic acid has since stopped and the manufacture of drinks has considerable expanded. Mineral water from the Hölle Valley is sold under various trade names e.g.