Patent ID: 8365943

Claim:
A device for impeding the transfer of energy, the device being comprised of: an inner shell defining a first interior space and a single opening that provides access to the first interior space, wherein the first interior space and single opening are defined by a bottom surface and a plurality of side wall surfaces extending in planes substantially perpendicular to a plane defined by the bottom surface; wherein each of the side wall surfaces further comprises a tab component having a first part and a second part at the end distal to the bottom surface, wherein the first part is formed to be positioned in a plane substantially perpendicular to the plane defined by the side wall and the second part is formed to be positioned in a plane substantially parallel to the plane defined by the side wall, wherein a gap is formed between the second part and the sidewall; an outer shell defining a second interior space with an opening that provides access to the second interior space, wherein the second interior space is sufficiently large to receive the inner shell; and an insulating component comprising a recyclable, cellulose based material, the insulating component is positioned between the gap and a space defined by an inner surface of the outer shell and an outer surface of the inner shell when the inner shell is inserted into the second interior space.