In this closeup you can see the insulating sandwich we made. First line of defense, gold foil. The gold foil reflects 80% of the radiated heat from the pipes. Next, polished stainless steel heat shields. Stainless has the lowest coefficient of thermal transfer (heat takes a LONG time transfer from one end to the next) of any common metal. Next, Aerogel. Aerogel has THE lowest coefficient of thermal transfer of any known material. During testing the interior was absolutely cool. No heat at all came through to the interior.