Provided is a gadget package for microwave oven cooking that can hold a three-dimensional shape formed by rising of a side surface portion due to expansion during microwave oven cooking even after opening. The gadget package 1 a includes a first surface part 4 a having a back-sticking seal part 3 a, a second surface part 4 b facing the first surface part 4 a, and a side surface part 4 c interposed between the first surface part 4 a and the second surface part 4 b and having an inward folding line. The side surface part 4 c is configured so that a width L3 from the folding line to the first surface part 4 a is wider than a width L4 from the folding line to the second surface part 4 B. Thus, since the side surface part rising by expansion during microwave oven cooking hardly falls inward...

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