Various blanks are provided for forming sleeves, containers, and other constructs for heating, browning, and/or crisping of a food item in a microwave oven, and for holding and/or transporting the food item after heating. The various blanks, sleeves, containers, and other constructs may include a removable portion defined by one or more lines of disruption that enable the removable portion to be separated from the remainder of the blank, sleeve, container, or other construct.

A container for holding a food product. The container can comprise a flange comprising a central panel. An opening can extend in the central panel. The container further can comprise a sidewall comprising at least a panel foldably connected to the central panel and a denesting feature extending outwardly from the sidewall. The denesting feature can be for engaging a nested container positioned below the container in a stacked arrangement and for forming a denesting gap between the flange and the nested container.

A container structure for sealing and keeping food fresh, which can be repacked after unpacking. The container structure has a container body and a covering film; the container body has a housing chamber, a first abutting face, a concave groove portion, a second abutting face and a preset break line; the covering film can seal the housing chamber and bond with the first and second abutting face, specifically, it is bonded to the first abutting face through the micro sealing portion, so that the bonding between the covering film and the first abutting face is weaker than the bonding between the second abutting face; To open the covering film, the user needs to apply a force upon the external edge of the top end of the container body, to break the preset break line, and to separate the covering film from the first abutting face, so as to form a separated and independent frame.

A frame is injection molded onto a group of panels to form a container. The panels extend at least partially around, and at least partially define, a cavity of the container.

A container for holding a food product. The container can comprise a flange comprising a central panel. An opening can extend in the central panel. The container further can comprise a sidewall comprising at least a panel foldably connected to the central panel and a denesting feature extending outwardly from the sidewall. The denesting feature can be for engaging a nested container positioned below the container in a stacked arrangement and for forming a denesting gap between the flange and the nested container.

A frame is injection molded onto a group of panels to form a container. The panels extend at least partially around, and at least partially define, a cavity of the container.

A method of forming a container from a blank. The method can comprise obtaining a blank having a wall portion, a flange portion, and a coating on at least a portion of the flange portion. At least one score line can extend at least partially in the flange portion, and the coating can at least partially cover the at least one score line. The method further can comprise forming the container from the blank by forming a wall of the container from the wall portion and forming a flange of the container from the flange portion. The flange can extend from the wall. The forming the container further can comprise forming the at least one score line into at least one pleat in at least the flange. The coating can at least partially cover the at least one pleat to form a substantially continuous sealing surface on the flange.

A microwave packaging material for forming a construct for holding a food item. The microwave packaging material can comprise a film at least partially secured to a substrate by a pattern of adhesive. A plurality of closed cells can extend between the film and the substrate, each closed cell of the plurality of closed cells can be at least partially defined by the pattern of adhesive, and each of the closed cells can be configured to expand during heating to form respective expanded cells. The microwave packaging material further can comprise a bonded region extending along at least a portion of the microwave packaging material. The film can be secured to the substrate along the bonded region, and the bonded region can be for forming at least one recess among the expanded cells and can be for extending along the food item when the microwave packaging material is heated.

A container for holding a food product. The container can comprise a base layer and a liner at least partially attached to an inner surface of the base layer, a flange comprising a central panel of the base layer, an opening extending in the central panel, and a sidewall comprising at least a panel foldably connected to the central panel along the opening.

A construct for heating a food item in a microwave oven includes a base, a wall extending upwardly from the base, a microwave energy shielding element overlying at least a portion of the wall, and a microwave energy diffusing element circumscribed by the microwave energy shielding element. The microwave energy diffusing element includes a plurality of microwave energy reflective elements within a microwave energy transparent area.