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
Pint glass Pint glass A pint glass is a form of drinkware made to hold either a British ("imperial") pint of or an American pint of . These glasses are typically used to serve beer, and also often for cider. The common shapes of pint glass are: Pint glasses became popular in the United Kingdom in the early/mid-20th century, replacing tankards (pewter, ceramic, and glass). This change is notably lamented by George Orwell in his 1946 essay "The Moon Under Water". Older styles include: In the United Kingdom, draught beer must be sold in Imperial measure (see ). United Kingdom law requires