There are two types of non-stick pans. One is polytetrafluoroethylene ("Teflon") coated. This coating looks like a plastic film. The other is porcelain coated. Porcelain coating is much more expensive. If you buy Teflon, you should pay attention to changing the cooking spatula. Do not use iron, otherwise the protective layer will be scratched. Once the protective layer is scratched, it is no longer non-stick. Your money is wasted. Use a wooden shovel or a special rounded shovel. They are sold in supermarkets. Just to protect it. Don't use wire scrapers when washing the pot. Use a soft dishwashing sponge. Because once you scratch it, it's over. Porcelain-coated non-stick pans are stronger and more durable.