It cannot be restored, and do not try to restore it, because it has a vacuum structure inside, and once pores appear, it will be the same as an ordinary cup.

The correct way to use the thermos cup:

1. Before using the new product, it must be washed several times with boiling water or detergent for high-temperature disinfection. Has achieved the effect of killing bacteria.

2. Before use, please preheat with boiling water for 5-10 minutes to achieve better heat preservation effect.

3. Do not overfill the cup with water to avoid burns caused by boiling water overflowing when tightening the lid.

4. Do not use a thermos cup to make tea.

5. After drinking, please tighten the lid to ensure hygiene.

6. When cleaning, it is advisable to use a soft cloth and edible detergent diluted with warm water.

7. Sometimes there will be some red rust spots on the inside of the stainless steel cup. You can soak it in warm water and diluted vinegar for 30 minutes and then clean it thoroughly.

8. To prevent the occurrence of odors or stains, and to use it cleanly for a long time. After use, please clean and dry thoroughly.