Air pressure cover of thermos bottle and ordinary heat preservation

The air pressure top of the thermos bottle is more insulated. The air pressure top of thermos bottle is characterized by more convenient cold preservation, heat preservation and pressing. The heat preservation effect of thermos cup with high vacuum rate can reach 10 hour, which is designed according to the principle of air compression. Ordinary thermos cups have low heat preservation performance and better heat dissipation performance than thermos cups, and the heat preservation performance can generally reach about two to three hours.