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.