US Patent 6875486 Package system and method

A packaging system having a container, a first radiant barrier covering the exterior of the container, an insulator covering the interior of the container, a second radiant barrier positioned in the container within the insulator for surrounding a payload, a payload surrounded by the second radiant barrier, a first phase change material having a preselected phase change temperature surrounding the payload in close proximity therewith, and a second phase change material having a phase change temperature higher than the first phase change temperature surrounding the first phase change material in close proximity therewith and being in close proximity with the second radiant barrier.