US Patent 8657108 Package container for orthodontic mouthpiece

A packaging container is constructed by a packaging container main body with a lid portion, and a label adhered to an upper surface of the packaging container main body. An accommodating portion main body of the packaging container main body has a first flange portion around an accommodating portion, and second flange portions positioned at right and left side ends of the first flange portion and extending in an outward direction from an upper end of each of step portions having the same height as a thickness of the lid portion. Further, an engagement concave portion engaging with an engagement portion of the lid portion is formed in a front portion in the center of the first flange portion, and the label is adhered to upper surfaces of the lid portion and the second flange portions to seal the container main body, and is unsealed by a cut line.