Triangle brand electric cooker is on sale on JD.com | 9 yuan. Its thickened non-stick inner pot is made of aluminum. According to the relevant public information, almost all rice cookers now use aluminum as the inner pot, because aluminum has better thermal conductivity, is light in weight, and will not rust or rot. Some also provide stainless steel inner pots for heat conduction. When cooking, the switch may jump to the heat preservation function before it is cooked. The problem with traditional aluminum cookware is: In 1989, the World Health Organization determined that long-term or large intake of aluminum will have adverse effects on the human brain and nervous system. Damage will be caused and it is recommended to limit applications that can lead to the intake of aluminum into the human body.