Originally Posted by AnnT
For bread basket warmers, I've made some using unglazed tiles. Just made a fabric envelope to fit the size tile I used and then heat the tile in the oven (never tried the microwave) and put it in its envelope and put that in the bottom of bread basket under the basket liner.
Whatever you do, don't try the microwave. Many clays have metals in their mineral content. Not a pretty picture. Well, actually, the sparks are kind of pretty(LOL), but it usually ends in having to buy a new microwave. And sometimes worse.