The invention relates to a product for preparing food, which product is manufactured of heat-resistant, foldable material and into the interior of which product the food is placeable, within the product is arranged one or more intermediate bottoms, between the intermediate bottom and a wall of the product is put material producing gas, and to the intermediate bottom are formed holes for transferring the gas into the interior. In the product according to the invention, the intermediate bottom is releasably fastened at least at the points of the holes in the wall of the product such that it is releasable by means of heating.
