The insert includes a base with an upper brim, the base including a first depression extending from a first flat major surface of the upper brim, the first depression including a floor with walls that define a first cavity, the walls including a first pair of opposing walls and a second pair of opposing walls, the first pair of opposing walls taper towards each other along a longitudinal length of the first depression from a first end to a second end of the first depression, and a lid connected to the upper brim, the lid covering the first cavity.

The invention comprises an ovenable packaging structure having an integral one-way valve. The laminate structure comprises an outer layer having a cut line which defines a flap that is separable from the outer layer, wherein the outer layer is adhered to an inner layer having a cut line which is offset from the outer cut line and defines a portion that is separable from the inner layer along the inner cut line and defines an opening into the packaging structure. The adhesive between the layers comprises, in an embodiment, a channel of pressure sensitive adhesive which surrounds both the outer cut line and the inner cut line, wherein the channel of pressure sensitive adhesive defines the perimeter of at least one adhesive-free valve chamber within said channel. The valve chamber comprises at least a portion of the outer cut line and the inner cut line.

The invention comprises an ovenable packaging structure having an integral one-way valve. The laminate structure comprises an outer layer having a cut line which defines a flap that is separable from the outer layer, wherein the outer layer is adhered to an inner layer having a cut line which is offset from the outer cut line and defines a portion that is separable from the inner layer along the inner cut line and defines an opening into the packaging structure. The adhesive between the layers comprises, in an embodiment, a channel of pressure sensitive adhesive which surrounds both the outer cut line and the inner cut line, wherein the channel of pressure sensitive adhesive defines the perimeter of at least one adhesive-free valve chamber within said channel. The valve chamber comprises at least a portion of the outer cut line and the inner cut line.

A lid, a container with a lid, a combination of the lid and the container, and a method for manufacturing the lid, which are capable of suppressing moisture permeation into fibers constituting the lid and capable of bonding the container and the lid by a sealing method even when the types of resin forming a resin coating layer formed on the surface of the container are varied. The lid is formed so as to be in contact with a container having an edge, and is formed of a blank material, the blank material includes a fiber sheet including fibers formed of a paper-based material, and a resin material is attached to at least some of the fibers forming an inside of the fiber sheet.