Blow the deformed part with a hair dryer first, then correct it by hand and then cool it quickly with cold water. So, slowly correct it until it works. But it's hard to get back to the same state as before.

At the same time, it is suggested that it is best not to use the plastic after heating deformation. Plastic will emit some toxic components after deformation, which may have bad effects on the body.

Extended data:

There is a number at the bottom of each plastic container (it is a triangle with an arrow, and there is a number in the triangle).

Other commonly used categories of "No.7" PC: kettle, water cup and milk bottle.

This material is widely used, especially in milk bottles. It is controversial because it contains bisphenol A. ..

Lin Hanhua, an associate professor in the Department of Biochemistry of City University of Hong Kong, said that in theory, as long as bisphenol a 100% is converted into plastic structure in the process of manufacturing PC, it means that the product does not contain bisphenol A at all, let alone is released. However, if a small amount of bisphenol A is not converted into the plastic structure of PC, it may be released into food or drink. Therefore, when using this kind of plastic container, we should be especially careful.

The higher the temperature, the more bisphenol A remaining in PC is released and the faster it is. Therefore, PC water bottles should not be used to hold hot water, so as not to increase the release speed and concentration of bisphenol A (if any).

References:

Baidu encyclopedia-plastic