Abstract: A stackable tray includes a tray body, which is formed by a cardboard blank including a heat resistant cardboard. The stackable tray includes a guiding element configured for providing a shifting of a first tray relative to a similar second tray located below the first tray in a first direction parallel to its surface, when first tray is stacked on a similar second tray; and the guiding element provides for preventing a shifting of the first tray relative to the similar second tray in a second direction substantially perpendicular to the first direction and substantially parallel to its surface.

Abstract: Food container for receiving food, in particular for catering purposes onboard aircraft, is combined with a flexible liner, in particular a tray liner, a placemat, a tablemat, or the like. The liner, in a wrapping position, is folded or rolled around the container and is attached or affixed in the wrapping position by detachable fixing element. There is likewise a method of using such a food container onboard aircraft for catering passengers.