| 摘要 |
<p>PURPOSE: To reduce the heat loss in the opening part of a container body by forming a taper that can come in close contact with a lid, at an opening part or in its vicinity. CONSTITUTION: The external wall 14 of a container body 11 is formed in taper shape over the whole wall so as to be gradually tapered toward an opening part 12 from the bottom part of the container body 11. With such a constitution, even if there is a certain degree of difference between the outer dimension of the container body 11 and the inner dimension of a lid 17, the external wall 14 of the container body 11 and the internal wall 18 of the lid 17 are brought into close contact with each other at one place without fail because of the tapered structure of the external wall 14 of the container body 11 so as to prevent the generation of a clearance between the container body 11 and the lid 17. As a result, there is no lowering of heat insulating performance between the container body 11 and the lid 17 so as to prevent the generation of heat loss at that part.</p> |
