Yes, Tupperware UltraPro Ovenware actually goes in a conventional oven as well as your microwave!
They look like iron pots, but they are actually food-grade plastic and can go in the
freezer down to -25°C/-15F°, or in the conventional oven up to 230°C/445F°.
Speed up cooking times by starting food in the microwave and then browning in the oven.
See it in action here...
Tupperware UltraPro Oval 2L
Tupperware UltraPro Oval 3.5L
Tupperware Ultrapro 5.7L Cosmos