I have been using a thermal cooker for a year and I love it! There’s brand called Tiger and Thermous that are better quality than the thinner inner pots someone mentioned. these brands are more expensive but worth it! I make lentil soup and brown rice at the same time. the pot was used a lot on our last camping trip. I made dinner in the morning and it was so nice to open up the pot and have a perfectly cooked meal piping hot! the fuller the pot is the longer it can retain heat! I wish I would have known about this thermal cooker when my boys were little! it would have been very convenient and time saver. Gas is not expensive where I live so that is not a concern! Good luck in the kitchen every one! I give this product 5 star’s