Bottle caps (also known as crown corks or crown seals) were invented by William Painter in Baltimore in 1892. The company making them was originally called the Bottle Seal Company, but it changed its name with the almost immediate success of the bottle cap to the Crown Cork and Seal Company. It still informally goes by that name, but is officially now called Crown Holdings.
How long will a keg of beer remain fresh?
All beers are at their best on the day the keg is filled at the brewery. As days go past, the freshness reduces, and in general, the fresher your keg draft beer is, the better it tastes. Keg beer will remain fresher longer if dispensing with CO2, while maintaining the proper temperature and pressure. Non-pasteurized beer can last about 45 to 60 days, and pasteurized beer can last about 90 to 120 days. However, if you’re dispensing the keg beer with a ‘party pump’ or ‘tap’ with oxygen (air), any draft beer will only remain fresh for about 8 to 12 hours. Most breweries will print a freshness date on the cap or side of each keg.
Originally published in our Micro Brew News' Trivia Time, Brewer's Alley & Monocacy Brewing Co. edition.