초록

A lunch box has a body, and a vessel filled with a freezable liquid so that the latter cools the interior of the body. Also heating element can be provided for heating the interiod of the body part.

대표청구항 ▼

A lunch box, comprising a hollow body bounding an inner substantially closed chamber for accommodating food; a hollow vessel removably attached to a part of said body so as to be located in said inner chamber when it is attached, and filled with a liquid which can be frozen and thereby cools said in

A lunch box, comprising a hollow body bounding an inner substantially closed chamber for accommodating food; a hollow vessel removably attached to a part of said body so as to be located in said inner chamber when it is attached, and filled with a liquid which can be frozen and thereby cools said inner chamber; and an electrical heating element connected with said hollow body and connectable with an electric power source so as to be heated and to supply heat into said inner chamber for accommodating food contained in said inner chamber for accommodating food, and disconnectable from an electric power source so as to be deactuated for cooling said inner chamber by said liquid-filled vessel, said liquid-filled vessel being mounted in said inner chamber so as to be movable between a first position in which it faces toward said inner chamber for cooling the latter, and a second position in which it faces away of said inner chamber and therefore said heating element so that when said heating element heats said inner chamber said vessel is less subjected to the action of heat from said heating element.