directly to the honeycomb core on both sides creates a sandwich type structure the honeycomb panel structure replicates the insulating system of a thermos in that a still airspace is enclosed by reflective surfaces by limiting a core medium to still air heat transfer by conduction is severely minimized in addition to providing the support structure to create a cavity between reflective surfaces the honeycomb cells divide the airspace into smaller cells and minimize heat transfer by convection as well since the balance of heat transfer could only occur by radiative means through this environment the inner wall surfaces are laminated with an 34 ultra low 34 emissivity aluminum foil the only barrier that can severely minimize long wave radiation transfer the outer corrugated cardboard box 12 includes sides 24 bottom 26 and two part hinged top 27 the top includes self locking slots 28 and tabs 30 to avoid the necessity of taping the top in order to secure the top in a closed position the perimeter side panel 14 is constructed from a single panel with three v shaped grooves 32 see fig7 the v shaped grooves facilitate the side enclosure and accurate placement of the three grooves along the length of the panel allows the panel to contour the inside of the outer box 12 by accurately locating the corners 34 see fig6 which may also have a suitable glue applied to secure the adjoining panel faces the top lid panel 16 may simply be a single member adapted to rest on top of the side panel 14 as shown in.