Comparison of the imperial and US customary measurement systems adopted a system based on the 231-cubic-inch wine gallon for all fluid purposes. This became the US fluid gallon. Both the imperial and US fluid gallon are divided into 4 quarts, 8 pints or 32 gills. However, whereas the US gill is divided into 4 US fluid ounces, the imperial gill is divided into 5 imperial fluid ounces. So whilst the imperial gallon, quart, pint and gill are about 20% larger than their US fluid measure counterparts, the fluid ounce is about 4% smaller. Note that one avoirdupois ounce of water has an approximate volume of one imperial fluid ounce
Beer in Australia the "schooner" of 285 ml, (an "imperial half pint"), and the "pint" of 425 ml. "Imperial pints" are also increasingly popular. Also increasingly popular inside pubs and restaurants is the sale of "premium" and non-locally brewed beer in bottles in the size range 300 ml to 375 ml. 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. Jugs, 1 fluid litre Maß in