A plastic hinge having elastic deformation is provided. The plastic hinge includes a body formed of plastic and shaped as a solid cylinder, the body including a groove having a depth extending from an outer surface of the body to an axial center of the body, the groove including a bottom and an opening, a width of the groove being gradually increased from the bottom to the opening, and the bottom being shaped as an U.

A cosmetic container includes an internal cover, an internal tray and a hinge. The internal cover is made of metal and includes a frame, two holding elements extending from the frame, and a gap between the holding elements. The internal tray is made of metal and includes a frame, two holding elements extending from the frame of the internal tray, and a gap between the holding elements of the internal tray. The hinge includes two leaves. The first leaf is sandwiched between a face of the internal cover and a face of each of the holding elements of the internal cover. The second leaf is pivotally connected to the first leaf and sandwiched between a face of the internal tray and a face of each of the holding elements of the internal tray.

A feeding container includes a container that includes a tubular accommodating portion configured to accommodate a cosmetic and has a first opening from which the cosmetic is exposed, a lid portion configured to open and close the first opening, and a lock member configured to lock the lid portion in a state where the lid portion closes the first opening. The lid portion opens and closes the first opening in a state where the lid portion is connected to at least one of the lock member and the container. When the lock member moves in an axial direction, which is a direction in which an axis of the accommodating portion extends, with respect to the container, locking of the lid portion due to the lock member is released, and the cosmetic is allowed to be exposed from the first opening.

A cosmetic container includes a base, a lid assembly and a pin. The base includes a cutout in an edge. The lid assembly includes a lug extending in the cutout and including an aperture. The aperture includes two terminal portions and a reduced portion between the terminal portions. The pin includes two ends extending in the base and a middle section movable between the first and second terminal portions of the aperture via the reduced portion of the aperture.