Today in 1906, US Patent 819768 A was issued, an invention of Alfred T. Kruse, assigned to the American Steel Package Company, for his “Sheet Metal Keg.” There’s no Abstract, although in the description it includes this summary:

My invention relates to improvements in sheet-metal kegs especially designed for the transportation and storage of liquids, such as whisky, beer, mineral .waters, &c. For this purpose wooden kegs are usually employed; but such vessels are objectionable from the fact that they soon become soaked with fluid, thereby becoming filthy, decayed, and heavy and liable to spring a leak, causing much damage and loss from the escape of contents.