At present, metal can packaging is recognized worldwide as a "safer and more environmentally friendly product". It is because the tinplate material used for metal can packaging has good impermeability and opacity, which can effectively prevent the contents from being oxidized by light and prevent pollutants from entering. Therefore, it has the characteristics of safety, hygiene, and health. Additionally, a more important point is that tin cans are more environmentally friendly containers because they can also be recycled and reused, in line with the national call for environmental protection. Moreover, if an empty can is placed in a natural environment, after 7 years of wind and rain, it will naturally oxidize, crush, or blend into the soil.