Today in 1905, US Patent 793579 A was issued, an invention of Robert H. Hackney, assigned to the Pressed Steel Tank Company, for his “Metal Barrel.” There’s no Abstract, although in the description it includes this summary:

The object of this invention is to produce a light, strong, and durable metallic barrel or keg with a smooth interior that will not catch and hold sediment and that can be easily and thoroughly cleaned.