In scientific research laboratories, it is often necessary to freeze and preserve some cell samples. Among many low-temperature products, liquid nitrogen tanks stand out. Not only can they maintain a low temperature of -196°C for a long time, but they will not affect cell activity. This is because the laboratory liquid nitrogen tank is made of aviation aluminum. A high vacuum interlayer is formed between the inner and outer tanks, and thermal insulation materials are added. Its advantages are light weight, low temperature resistance, thermal insulation, and reduced liquid nitrogen volatilization; it is a good thermal insulation performance cryogenic container.