Oak barrels are not modern packaging and therefore their number is constantly decreasing in favor of metal barrels. The production of new wooden barrels has been discontinued for many years, and severely damaged barrels are not subject to repair and are withdrawn from the market.
The oak barrels used most often have a capacity of approx. 100, less often 200 dm³. The barrel capacity tolerance is ± 5%. Barrels with a capacity 100 dm³ are clad in staves of thickness 34-35 ± 1 mm and width 70 mm. Such a barrel is reinforced with four hoops, two extreme ones and two in a bunch.
Barrels of m e t a l o w e are made by a smelter of aluminum A1Z4. It is a material containing in its composition 99,5,% aluminium. The weight of the barrel is 31 kg.
Aluminum barrel with a capacity 100 dm³ is oval. The weight of the barrel is approx. 31 kg.
Aluminum barrels, similar to wooden barrels, have two holes: one in the day, the second in a bunch. The opening in the bottom is closed with a natural or plastic stopper. The opening in the bundle is closed with an aluminum threaded plug with a paraffinated fabric gasket or a special plastic plug.
Technical progress in the field of packaging is characterized by the constant striving to introduce lighter packaging, more durable and more useful for high-capacity bottling lines operating in a fully mechanized manner.
There are famous glass bottles made of high-quality glass material abroad. These types of bottles have thin walls and are more resistant to breakage due to the temperature difference.
There is information about the use of plastic bottles in some Swedish breweries.