In the beverage industry of today, the advanced printing processes allows some manufactures to print almost as well on cans as they can on paper labels. Therefore, beverage manufacturers choose to use the aluminum beverage more than ever before. Sleek beverage cans are becoming increasingly popular and utilize innovative shapes to attract consumer attention. The latest technologies in custom beverage cans allow for asymmetrical designs with fine detail and significant expansion capability, and are available in many different shapes and sizes. An aluminum beverage can has an internal coating to prevent its contents from coming in direct contact with the aluminum, thereby maintaining the integrity of the beverage. Filling cans Cans are filled before the top is crimped on. In terms of engineering, can walls are about 90 micrometers thick, so empty cans are light, weak and easily damaged. The filling and sealing operations need to be extremely fast and precise. The filling head centers the can using gas pressure, purges the air and lets the beverage flow down the sides of the can. The machine places the lid on the can and then crimps it in two operations. A seaming head engages the lid from above while a seaming roller curls the edges of lid around the edge of the can body. The head and roller spin the can in a complete circle to seal it all the way around. Then a pressure roller with a different profile drives the two edges together under pressure to make a gas-tight seal. Filled cans usually have pressurized gas inside, which makes them stiff enough for easy handling.