| 摘要 |
<p>This invention relates to an apparatus comprising a double walled container in which a heat regenerating agent is sealed, a heat insulating ring mounted on the upper periphery of said double walled container, a supporting shoulder located on the external periphery of said heat insulating ring, an engaging portion located at the lower periphery of said supporting shoulder, and a mating portion located on a cover for detachably mounting in engageable mating portion provided in a handle projecting from said external case.</p> |
