"pint" (425 mL) is the same size as other States' schooner, and is three-quarters of an imperial pint. Headmasters is one of the most common glass manufacturers, at least for the schooner size. Many pubs, in Sydney and Melbourne particularly, offer Guinness style and/or conical pint glasses along with tankard glass and British dimpled glass pint mugs. Larger serving measurements have become increasingly popular, such as Jugs, 1 fluid litre Maß (pronounced like "mass", normally in German-themed bars) and beer towers (although technically illegal due to strict self-service of alcohol laws, these are in some Asian bars/karaoke parlours) have grown in popularity around Australia in tourist spots. Beer bottles Prior to metrication, beer bottles were frequently , while a carton of beer contained a dozen bottles (two gallons) of beer. Originally, the bottles were reduced slightly to , but with metrication they became , with a carton of of beer. From the 1950s, bottles known as "stubbies" (as compared to traditional bottles, they were "stubby") of were introduced. In 1958, cans were introduced by CUB, which were originally in steel and the same size as the bottle; other breweries introduced these in the 1960s. Originally the stubbies and cans were reduced slightly to , but with metrication they became , and the cans were later made of aluminium to accommodate its increasing use and lower cost compared to steel. A carton of nine litres of beer in stubbies (i.e. 24 bottles) or cans became known as a "slab" because compared to the more cube-like shape of the traditional cartons, they were flatter, and hence, like slabs. Traditional bottles subsequently became known as "long necks" or "tallies" to distinguish them from stubbies, and in Western Australia, the 750ml "long neck" bottle is known as a "king brown" because of the size and typical brown coloured glass. In the 21st century, most bottled beer in Australia is sold in 250 mL (Throwdown/Twist Top), 375 mL (Stubby) or 750 mL (Long Neck) sizes. Carlton United briefly increased to 800 mL in the 1990s and 2000s, but this has since been reduced to the original 750 mL. Bottle sizes of 330 mL, 345 mL and 355 mL (imported from the United States, equal to 12 US fl oz) are becoming increasingly common, particularly among microbreweries, so-called "premium" beers, and imported beers. In the Northern Territory, the once-common "Darwin Stubby", a large two litre bottle,