My last girlfriend had some Corningware glass saucepans with lids. Not only did these work very well for steaming vegetables, they also worked amazingly well for making Bechamel and Bechamel-based sauces in the microwave. I used them with the lids for vegetables, and without for the sauces. When cooking vegetables, the lid's imperfect seal "blows off steam."
For anyone who has not made Bechamel, or "white sauce" in the microwave, I highly recommend it. It works very well, especially if you are preparing a big holiday meal, and don't have time to constantly stir a sauce for several minutes.
I don't miss her all that much, but I do
miss that Corningware!