1. A closable food-carrying case comprising: a rigid shallow tray having a rectangular bottom wall and four upstanding side walls; said side walls having upper edges located in a common plane; a first concave foam liner fitting within said tray; said first foam liner extending entirely around said tray; said first foam liner having an upper annular edge substantially coincident with the upper edges of the tray side walls; a rigid openable lid comprising a top wall and four depending side walls; said lid side walls having lower edges thereof located in a common plane; a second concave foam liner fitting within said lid; said second foam liner extending entirely around said lid; said second liner having a lower annular edge substantially coincident with the lower edges of the lid side walls so that when the lid is closed the lower annular edge of the second liner is sealably engaged with the upper annular edge of the first liner; each said foam liner being formed of a closed cell foam material that is compressible; each foam liner having thermal insulation properties; a thermal bottle dimensioned to fit within the space circumscribed by said second foam liner; and means for detachably mounting said thermal bottle in said lid; said second foam liner having a flat section thereof sandwiched between the lid top wall and the thermal bottle to insulate against heat transfer between the bottle and the lid top wall; said bottle mounting means comprising at least one internally threaded sleeve extending from the lid top wall through and beyond the flat section of said second foam liner, and a screw extending through the bottle into the threaded sleeve to secure the bottle to the sleeve; the annular edges of the foam liners protruding slightly beyond the edges of the associated side walls so that when the lid is closed the liners form a compression seal; said foam liners cooperatively forming a complete insulative wall around the thermal bottle and food items placed in the tray.