How to install the sealing ring of gourmet thermos cup?

1. First, before installing the sealing ring, make sure that the surface of the lid and sealing ring of the thermos bottle is clean and free of dust or impurities.

2. Secondly, align the sealing ring with the notch on the cover of the thermos cup, and gently press it so that the sealing ring is completely embedded in the notch.

3. Finally, after installing the sealing ring, check whether the sealing ring is installed correctly and whether it is closely attached to the cover of the thermos cup to ensure the sealing performance of the thermos cup.