Thermally insulating box inserts, and methods of making and using the same

A thermally insulating box insert comprising:

• a fiber-containing sheet having (i) a front surface, (ii) a rear surface, (iii) a top edge, (iv) a bottom edge, (v) opposite side edges, said opposite side edges being parallel with one another, and (vi) two openings extending from said front surface to said rear surface, and being positioned within an outer periphery of said fiber-containing sheet formed by said top edge, said bottom edge, and said opposite side edges,
• wherein said fiber-containing sheet is folded to form a box insert profile comprising:
• a bottom layer comprising outer sheet portions of said fiber-containing sheet extending along said opposite side edges with said opposite side edges extending proximate to one another within said bottom layer from said top edge to said bottom edge;
• a top layer comprising three separate center sheet portions of said fiber-containing sheet, each of said three separate center sheet portions being spaced from (i.e., separated from) one another within a top layer plane, said top layer plane being spaced from and extending over said bottom layer,
• opposite side layers with each opposite side layer comprising three separate connecting sheet portions of said fiber-containing sheet, each connecting sheet portion of said three separate connecting sheet portions connecting (i) a top layer side edge of one of said three separate center sheet portions to (ii) a bottom layer side edge of said bottom layer,
• said two openings separating said three separate center sheet portions from one another, each opening of said two openings extending along (i) said top layer, and (ii) said opposite side layers, and
• a box insert channel extending through said box insert profile so as to be bound by said bottom layer, said top layer, and said opposite side layers.