Material to retain heat Answered
: I thought of something I could make for an Instructable. To keep the idea until I publish, I'll exclude the actual idea. I need a material for this project that will retain heat from a microwave oven for ≥20 to ≥30 minutes, Ideally Id like to keep the Temp around 180 degrees Fahrenheit.
What can I use for this? We all know metal cant go in the microwave. Ideas??