What materials are better for bowls of rice and soup pots? Healthy?

There are many kinds of tableware. If it is healthy, it is generally recommended to use stainless steel products, which have no radiation, that is, they dissipate heat quickly and cannot be used well in winter. Beautiful or traditional porcelain, but try to use light color and few flowers, especially no flowers on the inner wall. As far as thermal insulation effect is concerned, soup pot or casserole, purple sand and microwave oven are all good. Although photovoltaic products look good and strong, they are still not used, especially for children's eating utensils.