Patent ID: 8286824

Claim:
An insulating container formed such that an exterior sleeve is slidably fit onto an outer circumferential surface of a body portion wall of a container main body, either one of an upper portion or a lower portion of the exterior sleeve is fixed onto the container main body, and a slit forming section including a group of slits is compressed in an up-and-down direction to have the slit forming section project outwardly from the exterior sleeve in order to form an insulating holder, a plurality of slits being formed within a certain range of the exterior sleeve in a height direction: wherein a shrink-deformable film is attached to an inside wall surface of the exterior sleeve; wherein an upper portion of the shrink-deformable film is bonded to an upper portion beyond the slit forming section of the external sleeve, a middle section covering the slit forming section is free from bonding, and a lower portion of the slit forming section is bonded to a lower portion beyond the slit forming section; and wherein the shrink-deformable film is shrunk to have the slit forming section project outward from the exterior sleeve, and wherein the lower end of the exterior sleeve is positioned equal to or upper than the bottom end of the container main body before deforming the slit forming section to project outward from the exterior sleeve.