Microwave packaging material

A construct for holding a food item, the construct comprising:

• a microwave packaging material comprising:
• a substrate;
• a film at least partially secured to the substrate by a pattern of adhesive;
• a plurality of closed cells extending between the film and the substrate, each closed cell of the plurality of closed cells being at least partially defined by the pattern of adhesive, each of the closed cells being configured to expand during heating of the microwave packaging material to form respective expanded cells;
• and
• at least one bonded region extending along at least a portion of the microwave packaging material, the at least one bonded region extending from a closed cell of the plurality of closed cells to an adjacent closed cell of the plurality of closed cells, the film being secured to the substrate along the at least one bonded region, the at least one bonded region being for forming at least one recess among the expanded cells and being for extending along the food item when the microwave packaging material is heated;
• wherein at least a portion of the construct extends at least partially around an interior of the construct for holding the food item.