We tested the Pyramid Pan and our tester thought it was a neat idea.
Product Test: Pyramid Pan
We bought the Pyramid Pan at Bed, Bath and Beyond for $14.99. It's made of silicone, and promises to allow air to circulate. It can go into the microwave, dishwasher or oven.
It's important to put it on top of another baking pan when putting it in the oven. The tiny holes which allow air to circulate also mean drippings from foods like chicken or beef. The pan worked well. Our tester, Lisa loved it and says she would pull it out and use it all the time. Two thumbs up!