a container for packaging frozen food in which the food can be reheated including a paperboard tray having upstanding side walls and horizontal flanges and an upright central divider wall forming separate food compartments in the tray . each compartment can be subdivided by pivoting a panel cut from the base of the tray transversely of the compartment to an upright position and locking the panel to the central divider wall . a pre - formed , semi - rigid blister of thermoformable plastic material is combined with the paperboard tray to provide a leak proof container .