Evaluation: I choose stainless steel, which is easy to brush and not afraid of wear. Stainless steel! It should be easier to clean. If you want to buy it, you can also check it on Santo. Stainless steel is good! It's just stainless steel. In cook the meat, stainless steel was fried with black gold. Supor now buys electric pressure cookers and sends them. If you don't send more cook the meat to the inner container, it's better to use stainless steel. The coated liner is suitable for cooking and does not stick to the pan. Stainless steel liner is suitable for soup. It is better to use stainless steel liner than coated liner. Choose electric pressure cooker liner, which is mostly made of stainless steel liner and composite coating liner. The advantage of stainless steel liner is that it is stronger, and the bottom is mostly three-layer composite bottom, which is thicker and more durable. The main advantage of the composite coated liner is that it does not stick to the pan and is easy to clean, but its resistance to metal spoons, steel balls and other things is weak, so attention should be paid when using and washing dishes. 1, stainless steel SUS20 1, 0.5mm thick, aluminum plate with 1mm thickness sandwiched at the bottom; 2. Surface treatment of aluminum alloys A6063, 2.0mm, 1.8mm, 1.5mm, 1.2mm; 3. enamel. Different materials have their own advantages and disadvantages. Because of the pressure vessel, it is recommended to choose a thick and heavy inner pot. It's better to be traditional Stainless steel is easy to burn, and the heat transfer time is not long. It is still the old brand Supor, and it seems to be beautiful. My friend bought a 4-liter electric pressure cooker and a stainless steel liner this year. At present, the porridge is mainly made of stainless steel liner, which is very easy to use. There is nothing wrong with the paint. I think the stainless steel liner is good. I wonder if the purple sand liner is high pressure. At present, electric pressure cookers are made of stainless steel, ceramics and composite coated liners. General household stainless steel is enough! Nowadays, electric pressure cookers have two liners in one pot, so it is convenient to use different liners according to different ingredients!