Do not use in a toaster oven or over an open flame. / Do not heat for more than 20 minutes.Do not use or store in a place subject to direct sunlight, high temperature or high humidity.Keep away from fire and other sources of heat.Precautions for microwave useRead your microwave's instruction manual before use.Do not heat oily or sugary foods.Do not heat while empty.Shorten the heating time for foods with low moisture content or for small amounts of food.