Microwave, Dishwasher, and Refrigerator Safe. 100% Food Grade Raw Material and Colors, BPA Free Plastic. It prepares the rice automatically, knowing when the rice reaches the proper temperature, it will switch from a cooking mode to a warming mode. The cooker will keep the rice hot when it is done and it can also be used to reheat the rice. The rice cooker comes in various sizes and should be purchased according to the quantity of rice you generally prepare. Using a rice cooker is quick and convenient, especially when making large quantities of rice, which makes them ideal appliances for food service establishments. Additionally, learning about rinsing your rice and the proper ratio of rice to water can help ensure that you’re serving the fluffiest and best rice possible to your guests.