A cup formed container made of a punched container blank of cardboard or the like has two opposite side pieces connected to the container bottom, and being wider than the bottom side with which they are connected. Opposite joint flaps are connected to the other two sides of the bottom. Each side piece has a central part which forms a complete container side and an outer side part on each end of the central part, these outer side parts each forming part of an adjacent side of the container, so that the outer side parts jointly form at least part of the intermediate container sides, with the joint flaps serving to complete the intermediate sides and keep the parts together. Around the complete upper edge of the container, including the corners, the container is formed with a downwardly directed narrow edge flange, which is made of and folded from the same material as the container sides and which forms an angle to the container sides, the flange being continuous and unbroken along the central side parts and the outer side parts of the side pieces, and hence around the corners of the container upper edge. The container may be lined. The construction stiffens the edge of the container, facilitates use of a reclosable lid, and removes the edge of the cardboard material from the contents of the container.
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