Abstract: A temperature controlled food service container is formed with an inner portion having side walls and an opening for the receipt of food, and an outer portion having sidewalls spaced from the inner portion with a eutectic gel, disposed between them. A ledge extends from the periphery of the outer portion with a flange extending from the inner portion seated against the ledge; and is held by an ultrasonic bond joining the ledge to the flange. The food container has ribs along the sidewalls of the inner and outer portions. Peripheral channels and ridges are formed respectively on the ledge and flange for welded engagement with each other, the channels having enlarged segments which extend beyond the cross-sectional dimension of a respective ridge received therein.

Abstract: A shelving system having at least four posts with upper and lower traverses between the posts joined by dovetails on the posts and post connectors connecting the posts. A metal core forms the posts surrounded by plastic. A support post underlies at least one of the traverses having a metal interior portion and an exterior plastic with a foot at the base and an end cap distal from the foot for engaging the traverse.