A brand new 4 piece Heat N Serve set from Tupperware.  These containers are freezer safe and microwave safe.  The red automatic vent allows steam to escape while microwaving without any food splatter.  The raised center hub eliminates under heated centers.  Freeze, refrigerate, reheat and serve all in one container.  This four piece set includes an 8 cup container, a 5 cup container and two 2 cup containers.  The lids are interchangeable on all  3 sizes.