Sterilization and storage container tray

In a sterilization tray assembly for sterilizing, transporting and storing surgical instruments comprising top and bottom mating enclosures, said mating enclosures each including a plurality of ports for permitting ingress and egress of gaseous sterilant;

• and means for locking said mating enclosures to one another, the improvement which comprises a rack rotatably mounted within the bottom enclosure, said rack having a plurality of spaced apertures into which surgical instruments may be removably inserted, said rotatable rack comprising an aperatured core member and including an apertured resilient, flexible cover member surrounding said core member at least in part.