I LOVE Tupperware's vent n serve (formerly heat n serve) containers. They come in a variety of shapes and sizes so there is a container for your every cooking/storing need.
They are microwave safe so they don't get ruined (LOOK GROSS) after using them multiple times. They also have neat little red things (vents?) that you can pull out so the closed container doesn't "explode" like it does with cheap imitation Tupperware.
To view this product and other Tupperware products, check out Audrey's Tupperware site by clicking here.