I found a picture where someone baked cake in small chinese food take out containers and I thought it was so cute. What other kinds of different containers can bake in the oven.

Actually, the cakes were put into the containers after baking....

Here's a previous thread on this topic:
(Actually, these cakes were put into the containers after baking....)

http://cakecentral.com/cake-decorating-ftopict-608234-.html

HTH