Today in 1900, US Patent 664227 A was issued, an invention of Alexander Plawin, for his “Beer Cooler.” There’s no Abstract, although in the description it includes these claims:

My invention relates to beer or liquid coolers; and its object is to provide a cheap and simple portable device of this character which can be conveniently carried by hand from place to place, so that it will be especially adapted for use on picnics and other outings when it is desired to have a barrel or keg of beer or other liquid and where no provision can be made for placing the barrel or keg directly on ice.