Blank for a disposable thermally insulated container

A container blank, comprising:

• a substrate layer made of disposable material suitable for forming a sidewall of a container, wherein the substrate layer has an interior and an exterior as well as upper and lower substrate layer portions corresponding to upper and lower portions of the container sidewall;
• and
• a shrink film layer secured to the interior of the substrate layer in a pattern extending over both upper and lower portions of the substrate layer, wherein the shrink film layer is adapted to shrink away from the substrate layer upon application of heat thereto, thereby providing a shrunk film layer secured to the interior of the substrate layer in a pattern extending over both upper and lower portions of the substrate layer after heat is applied to the shrink film layer;
• whereby the shrunk film layer provides a plurality of pockets of thermal insulation between the substrate layer and shrunk film layer in a pattern extending over both upper and lower portions of the container sidewall when present on an interior of a container;
• and
• wherein the shrink film layer is secured to the interior of the substrate layer with a plurality of generally parallel equally spaced seal lines extending from the lower portion of the substrate layer to the upper portion thereof such that the shrunk film provides a plurality of generally parallel, generally vertically oriented thermally insulating air pockets extending from the lower portion of the sidewall of the container made from the blank to the upper portion of the sidewall of the container made from the blank.