I have updated this page 2 times before since the authors of two different videos have removed their videos about creating a microwave kiln but to my surprise, there is now an even better video:
I found loads of videos on how to use this type of kiln on YouTube but none on how to go about making it, This video does.
Now if you are skilled enough to use it you are certainly skilled enough to make it.
This thing can be used for sintering metal powders, ceramics, glass, and high-temperature chemistry.
Have you made a Microwave Kiln or something similar? Lets us know how it went in the comments.