Abstract: A lid may be for a temperature-conserving container and may include a bottom wall, a side wall formed around a perimeter of the bottom wall, and a top wall connected to the side wall. An insulative cavity may be between the top wall and the bottom wall, and the insulative cavity may be configured to reduce heat transfer through the lid. A lip may be formed around at least a portion of an outer surface of the side wall or the top wall. The lid may be configured to be slidably received in an opening of the temperature-conserving container such that at least a portion of the lip engages a top rim of the opening and forms a seal between the outer surface of the side wall and the inner surface of the opening, thereby sealing the temperature-conserving container.