Recommendation-so why bother making these, I thought the purpose was to prevent heat from penetrating to hands , like a hot pad---- I did not nor will I make these things for myself or others(who really would not heed instructions- I would not want to be responsible for a tragedy). When tato cookers for micro were popular, I was given one as a gift---then the problems were made known, mine went in the garbage-actually only used once or twice, saw no difference!