The subject innovation relates to quick lime, and one-time heating to lunch using the heat generated when the reaction water by heating the lunch box made of aluminum foil of a not built-in seated thereon to a hot meal.; And the subject innovation is a box having an opening and closing lid by folding the upper opening 10. In order to achieve the object; Small stepped 21 and the back and forth of a large height up to the top of the box on both sides by forming a large stepped (22) of smaller height in the upper part with an opening state of the first box 20 is mounted in the box; The first box loosely inserted therein, the seating space part (a) to have, and at the same time the upper part with an opening that is mounted on the hanging against stepped flange 31, the second box 30 and having a; Kimcheon 42 per fixed to Kimcheon 42, cast extended to the bottom each in one side wall is fixed to the stapler pins (p) between the center is placed a perforated line (41) at a predetermined interval of the second box is , the seated in a drawn out state through the incision 32 in the second box 30 through the large stepped (22) the upper surface of the first box 20 through the cut-out portion 12 of the box 10 mulpaek 40 and; Heating the nonwoven fabric to be to accommodate a sac (52) having a quick lime (51) inside the plastic bag 53 is placed on top of the mulpaek 40 packs (50) and; It characterized in that the disposable lunch container 60 of aluminum foil material with a built-in instant food is formed to be laminated to the upper portion of the heat pack.
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