| 摘要 |
PURPOSE: A double bowl having a rigid coupling structure is provided to prevent an external vessel from being separated from an inner vessel when the bowl is used for a long time or external shock is applied to the vessel. CONSTITUTION: A double bowl having a rigid coupling structure comprises: a food receiving space(110) which has an opened upper portion and a recessed inner portion; a stainless inner vessel(100) at which a curling unit(120) having an upper portion rolled up is formed; a plastic external vessel(200) which has a protrusion unit inserted into the inner space of the curling unit; and plural coupling recesses which are formed at the bottom portion of the external plane of the inner vessel.
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