They are generally made of aluminum and need another nozzle to pump out the contents, and are frequently used to transport massive quantities of beer due to their shape. The beer contained in pressurized kegs have to be filtered and pasteurized to leave the yeast that the beer is made of inactive. Doing this increases the shelf life of the beer without compromising the taste.
Beer kegs are designed specifically to dispense keg beer. Not to be mistaken with drought beer, keg beer refers especially to beer served under pressure. Technically, drought beer means any beer served by a larger container, which might include a beer keg or cask ale. A lot of people disapprove of beer kegs and all beer served by a pressurized keg, particularly since the 1960's when pasteurized drought beers were substituting traditional cask beers.
Often times beer served from pressurized kegs can taste bitter and the carbonation can be low, though the quality of the kegging process has improved. However, some folks believe chemicals are used in the process, as often lead drinking considerable amounts of beer from a pressurized keg may lead to nausea or headaches. Despite the concerns of beer drinkers, keg beer has altered traditional cask ale in many bars and alcohol institutions. Because of the concern of consumers, many bars offer both keg beer as well as cask ale for their drought beer selection as well as traditional bottled beer.
If looking for beer kegs online, there are various producers and breweries which offer their services on line.
https://www.beer-delivery.co.uk/
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