The high-tem can destroy the entire virus and prolong the lifespan of the medicine. The transparent boiling bag enjoys one-year lifespan but the opaque aluminum foil-boiling bag enjoys more than 2-year lifespan. It can block the damp and the oxygen extremely well. The sealing open is sealed well. The printing is done with high quality. The foodstuff in the bag can be eaten after heating 3 minutes.