Businesses working with hollow glass manufacture or supply glass articles formed around an enclosed space. The category most commonly covers containers such as bottles, jars and vials, used for food, drink, cosmetics, medicines and other products. Manufacturers melt glass and shape it using processes such as pressing or blowing, then anneal it to reduce internal stress and inspect it for defects. Containers may be made in different sizes, shapes, colours and glass types, with finishes designed to take closures such as screw caps, corks or dispensing pumps. Some businesses also produce hollow glass for household, decorative, laboratory or technical use, including drinking vessels, ornaments and specialist glass components. Services can include developing or adapting moulds, producing small or large production runs, applying colour or surface decoration, and supplying related items such as lids and closures.