Abstract: A food delivery apparatus includes a domed shell that defines an interior space. A thermal storage device is secured to the shell so as to direct heat downward to food within the interior space.

Abstract: A warming system includes a thermal battery for storing energy and warming an item. The thermal battery includes a porous, electrically-conductive material and a phase-change substance. The phase change substance is interspersed in a plurality of pores in the porous, electrically conductive materially. The warming system includes a first and second compartment. The first compartment is for receiving an item to be warmed, and the second compartment is for retaining the thermal battery therein.

Abstract: A seal has a core ring that is corrugated and a resilient material is attached to one or both of the top side surface and the bottom side surface. There is at least one corrugation on the top side (a convex corrugation) and at least one corrugation on the bottom side (a concave corrugation). The corrugations have sharp peaks and are shifted out of phase. A grommet around the inner diameter deters extrusion of the resilient material into the sealed system, and a folded over portion on the outer diameter helps deters extrusion into the environment.