Beer in Australia is formally measured in metric units, but draught beer is commonly ordered and sold in glasses approximating imperial measures, including a 570 ml pint. (In the state of South Australia, "pint" refers to a 425 ml ( pint) glass, known as a schooner in the rest of Australia.) As in the UK, certified glassware must be used; the capacity of the beer glass is defined by either the brim or, where present, the fill line. There are no legally prescribed sizes for beer volumes, but the stated capacities, which are a legal requirement, must be formally tested by the hoteliers and breweries.