a rigid polymer domed food container system suitable for heated food products is described . recessed vents in the lid of the food container systems permit stacking of multiple container systems while allowing heated gases to escape without restriction . other features of this container system include the retention of food product within the central region of the tray , rigidized handholds to allow the consumer to lift the heated container , and a releaseably lockable snap - fit grip mechanism that facilitates opening of the container system among other things .