I agree with the 100% everything & look forward to seeing your potato bag & you can do the same idea to make wrap bag for tortilla's & also corn on the cob too. ~hugs Loralye~
Pellon has something new I believe to replace the Hot Tater but what I've used is their 100% cotton and make sure packaging states it does not have glue or resins. Need 100% cotton fabrics and cotton or rayon threads. Do not use polyester. Also instructions are not to heat over 2-3 minutes. Mainly the hot pot or bowl pad is just for heating and not cooking something. My friend tried wrapping her potato with it and it scorched so no long cooking of anything with them. Would not trust anything over 3 minutes.
https://www.quiltinaday.com/commu...;topic=24991
If the link above takes you to a different page, just go the link below and scroll down to the post by bowlds and follow her link.
I make the microwavable bowls. Everything has to be 100% cotton including the thread. I often stick the material and batting in the microwave for 3 minutes if I am not sure about the fiber content or do the burn test.
I just bought some batting at JoAnn Fabrics, called Wrap-N-Zap by Pellon. 100% cotton batting, says microwave friendly. Even has a pattern for a "baked potato zapper". I just have to gather cotton fabric and thread and start.
Jo
I purchase Mountain Mise 100% quilt batting and cut my squares to the size I need for the bowls. Have made and sold 100% and always add the instructions of how to use so they can't come back on me if they leave them in the microwave for too many minutes