HotSmart plates are especially designed to keep food hot; their name describes them; They are sold as: InstaHot 30 min plusHotSmart Plates. The purpose was simply the enjoyment of hot food, however they have been discovered by Weight Loss Surgery Patients or WLS, and are also being used by ALS and Alzheimer patients. Follow me on twitter for lots of information about Eating Slowly to avoid overeating and losing weight