This 12 oz. (355 ml) Amber Long Neck Glass Beer Bottle is known as the industry standard bottle (ISB). It is commonly associated with its crown or pry-off finish, long neck and narrow body. Sometimes referred to as the North American longneck, this long neck beer bottle is made of amber glass, which provides UV protection for the bottle’s contents, helping to maintain its taste. This beer bottle is a perfect choice for breweries or parties when you want to store beer, mead, or cider. A standard 5 gallon batch of homebrewed beer will require between 48 - 54 12 oz. bottles.