Abstract: The purpose of the present invention is to provide a revolutionary coffee storage container of exceedingly high commercial value. This coffee storage container is designed for storing coffee (20), and has: a container body (1) in which an inner cylinder (3) made of metal is arranged within an outer cylinder (2) with a space (S) therebetween, the space (S) between the outer cylinder (2) and the inner cylinder (3) functioning as a vacuum insulation space; a closure body (4) for providing closure to an opening (1b) of the container body (1); and a coffee pouring cup body (5) that fits about the closure body (4) once the opening (1b) of the container body (1) has been closed by the closure body (4). An inner surface portion (1a) of the container body (1) that comes into contact with the coffee (20), a section of the closure body (4) that comes into contact with the coffee (20), and an inner surface portion (5a) of the coffee pouring cup body (5) are constituted by inert synthetic resin.

Abstract: The present invention is aimed at providing a method for producing a vacuum-insulated double container that exhibits a remarkable and heretofore unobtainable operating effect. The invention provides a method for producing a vacuum-insulated double container by placing a titanium internal cylinder (2) into a titanium external cylinder (1) via a space section (S), and using the space section (S) between the external cylinder (1) and the internal cylinder (2) as a vacuum-insulating space section, the method comprising the steps of degassing the space section (S) of a workpiece (3) that includes the external cylinder (1) and the internal cylinder (2), and vacuum sealing a degassing hole while the workpiece (3) is heated in a vacuum heating furnace (6); and then providing concavoconvex portions (4, 5) to a surface of the recrystallized external cylinder (1) and the internal cylinder (2) by placing the workpiece (3) in an atmospheric-pressure environment.