However, it should be noted that the storage time of liquid nitrogen is limited, and it is only suitable for temporarily storing a small amount of liquid nitrogen. If a large amount of liquid nitrogen needs to be stored for a long time, it is recommended to use a professional liquid nitrogen tank. In addition, after filling with liquid nitrogen, the lid of the thermos cup should not be sealed too tightly, and a gap should be left for the liquid nitrogen to vaporize and volatilize to prevent the explosion.
The above information is for reference only. It is recommended to consult experts in relevant chemical fields to obtain accurate information.