Businesses involved in the distillation of alcoholic drinks produce spirits by fermenting agricultural ingredients and heating the resulting liquid so that alcohol vapour can be separated and condensed. Common ingredients include grains, fruit, molasses and other plant materials. The spirit may be distilled once or several times, then diluted, blended or matured before being prepared for sale. Products can include whisky, gin, vodka, rum, brandy, fruit spirits and other distilled beverages. Some producers also make neutral alcohol or supply spirit for use in liqueurs and other drinks. Typical services may include contract distilling, blending, bottling, labelling and the development of recipes or production methods for other businesses. In the UK, commercial production is subject to rules on alcohol production, excise duty, food safety, labelling and licensing.