![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
What's the function of "a smart lid" ? What is a disposable cup? What special material is used for a smart lid? What's the difference among "additional", "additive" and "addict"? How can a user be wanred of the hot drink? What are the special features of the smart lid?