1, with a straw, it is possible that the lid of the cup is deformed or broken. Just change the lid. If you don't use straws, there are two possibilities. First, the sealing ring of the cup cover may fall off during cleaning. Without a sealing ring, it will definitely leak. Or you can buy a matching cooker sealing ring, and you can choose according to your own needs.

2. You can exchange it for a new one. Secondly, you must choose regular products when buying, because the quality of regular products is very guaranteed, which can effectively avoid the phenomenon of water leakage in straw thermos cups.