Each sized glass had a different name in each Australian state. These were replaced by glasses of size 115, 140, 170, 200, 285, 425 and 570 mL, and as Australians travel more, the differences are decreasing. Smaller sizes have been phased out over time, and in the 21st century, very few pubs serve glasses smaller than 200 mL (approximately 7 imp fl oz). Those typically available are the 200 mL, 285 mL (10 fl oz) and 425 mL (15 fl oz), with increasingly many pubs also having pints (570 mL, approximately 20 imp fl oz) available. It is also common for pubs and hotels to serve large jugs filled to 1140ml ( approximately two imp pints). Many imported beers are also served in their own branded glasses of various sizes, including , and for many European beers. With the introduction of the National Trade Measurement Regulations in 2009 there are no prescribed sizes for beverage measures for the sale of beer, ale and stout, so terms such as seven, middy, pot or schooner do not legally specify a particular size. A typical "schooner" glass can be calibrated to hold 425ml to the rim but poured with 15mm of head, resulting in a "schooner" of 375ml of beer and 50ml of froth. South Australia in particular has some unusually named measures: 6 fl oz (170 mL) – prior to metrification this glass was known as a "Butcher" 7 fl oz (200 mL), became known as a "Butcher" in later years after smaller sizes were phased out 10 fl oz (285 mL) known as a "schooner". Prior to metrication and standardisation of glass sizes throughout Australia, schooners in SA were 9 fluid ounces (256 mL). 15 fl oz (425 mL) known as a "pint" 20 fl oz (570 mL) known as an "imperial pint" Many of these sizes are now rarely used. In contemporary SA pubs and restaurants, the most frequent measures are the "schooner" of 285 mL (an imperial half pint), and the "pint" of 425 mL. "Imperial pints" are also increasingly popular, along with the sale of "premium" and non-locally brewed beer in bottles of between 300 mL to 375 mL. Note that the SA "schooner" and "pint" are considerably smaller than the measures of the same name used elsewhere: the SA "schooner" (285 mL) is the same size as other States' pot / middy / half pint the SA