what does the m number mean on a pint glass
imperial fluid ounces the manufacturing company or site
title: Pint glass text: 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 title: Pint glass text: is now rarely the case and lined glasses are found mostly at enthusiasts' events such as beer festivals, serious cask ale pubs, and breweries' own bars. 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 (¾ 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 title: Pint glass text: small pits which aid in nucleation, allowing the gas within it to be released more easily, thus preserving the head. Without the aid of these pits a regular pint glass will keep a head for only 3 or 4 minutes before appearing 'flat'. The markings come in a variety of styles ranging from a simple circular or square hatched pattern to more complicated branding messages. Pint glass collecting is an increasingly popular way for individuals to commemorate their visits to popular tourist destinations, most notably to microbreweries or sports arenas. These destinations often sell pint glasses adorned with their logos, title: Pint glass text: standard rulings. Starting in 2006, the NSAI "pint" mark, a circle featuring two wavy lines, between which "PINT" is written, with a year mark (last two digits), and a three digit batch code either side; has begun to be phased out with a European standard "PINT"/CE logo stamp . Smaller Pint glasses have been used in pubs and nightclubs though. In Israel, although officially defined as 568ml, pubs use the term rather arbitrarily and the "pints" served constitute a wide range of volumes (360ml–440ml). In the past, the custom was to serve beer in 330ml or 500ml in the original title: Pint glass text: selling a short measure, and says that it costs drinkers £1m a day in beer they have paid for but not received. The British Beer and Pub Association has issued guidelines for bar staff to give a 'top up' to any drinker who is unsatisfied with the measure they receive. CAMRA recommends the use of "lined" or "oversized" glasses in pubs. These have a line near the top (usually labelled "pint to line") to which the beer should be poured, with the head forming above it. In the past a number of breweries supplied these glasses to their pubs; this