| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the inspecting work of products by forming an entire container out of transparent material so that at least the lowermost part of a packing can be visually verified over its entire circumference from the outside through the whole container. SOLUTION: A heat insulting container 1 has an inner container 2 in an outer container 3 leaving an interval of a void part 4. A transparent synthetic resin material e.g. a material with a transmissivity of 45% of visible rays is used as the materials of the inner container 2 and the outer container 3. A packing 26 is arranged between the plug body mounting part 19 of an upper part 13 and the inner container 2. As the lowermost part of the packing 26 is visually verifiable over its entire circumference from the outside through a double-wall container 5, it is possible to visually verify whether the packing 26 is arranged at a predetermined location over its entire circumference. Therefore, in the case that the arrangement location of the packing 26 is displaced in a manufacturing process, it is possible to verify containers with displaced packings immediately and to facilitate the inspecting work of products.
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