bonsai pots

I am not going to bore you with my personal views on bonsai pottery. So I keep it brief and point you to the references that are meaningful. This is by far the most insightful YouTube I watched about quality of clay and glaze to date: 

https://youtu.be/KgsoSudK14Q?si=e_wFv5O3SuOzxpIQ

Are you contemplating to baking boinsai pots yourself? NaoTokutake, a reknowned American potter recommends digitalfire.com and you will figure it out.