For the solar oven.

[hippywife]

I scored these off of craigslist a couple of weeks ago for only $25. They are accessory inserts for a huge old electric roaster. They are perfect for the solar oven. Baking apples and a pot of beans in the oven today. :9

[Warpy]

1. The shape is especially nice

but I've found you don't really need black pots. My orange Le Creuset stuff works just fine in it.

If you can find square pans, it doesn't matter what color they are. If they're white, you can always spray paint the outside a dark color.