The invention relates to a plate-shaped structure designed for covering a reservoir, said plate-shaped structure comprises a substantially flat surface and a flange at the periphery of the substantially flat upper surface, wherein the flange comprises plurality of openings designed to receive a protrusion on an exterior sidewall of the reservoir, thereby covering the reservoir. The invention also relates to an assembly comprising a reservoir comprising an upwardly extending exterior sidewall comprising outwardly extending protrusion and a plate-shaped structure of the invention wherein the downwardly oriented flange comprises openings designed for receiving one or more protrusions on the upwardly extending exterior sidewall of the reservoir, preferably the assembly being a drinking cup and a cover. The invention also relates to a process for the manufacture of the plate-shaped structure using a pulp molding process.

Closures are provided consisting of a lid or cap member and a container member. These are inter-engageable with one another. The lid or cap member has a skirt and the container member has an upstanding rim, each of which is of generally polygonal shape. Located on each of the facing walls on each side of the polygonal shape are inter-engageable projections. The inter-engaging surfaces of the projections run substantially in a plane perpendicular to the axis of the polygonal shape and are of relatively small angular extent about that axis. The material of one or both of the skirt and container portion is resiliently elastic. The closure may be assembled with an axial push, and removed by twisting.

The disclosure refers to a lid in the form of a building block, including a side wall, top surface with an internal wall and an external wall, the base of the lid, one or more male pins and one or more female openings, with their longitudinal axes placed in a direction that is essentially parallel to the internal section of the side wall provided with a lid fixing element to the package to be closed, in which one or more male pins have an external diameter of (4.80.1) millimeters, of (6.50.1) millimeters, or of (9.40.2) millimeters, and one or more female openings which have an internal diameter of (4.80.1) millimeters, of (6.50.1) millimeters or of (9.40.2) millimeters.

A closure assembly for a container, comprises a spout (1, 3) and a rotational cap (2) injection moulded of plastic material. The cap comprises a top wall (2a) and a downward depending skirt (2b). The cap has two wings (5), which are integrally moulded of plastic material and extend vertically and outward in a lateral direction over a wing length in substantially opposite directions from an inner end to a tip. The wings each have a base portion, a center portion, a top portion, and opposite front and back sides. At least the center portion of each wing is connected to the skirt of the cap. The base portion and the top portion of each wing are substantially flat. The center portion of each wing comprise at least one corrugation (12, 12, 12) that extends along a part of the length of the wing and forms a groove on both sides of the wing, which grooves of the corrugation, as seen from a sideways view of the wing, together form an alternating waveform, e.g. a sinusoidal shape.