The patent for the can pull ring was invented by DRT Company (Freze) of Teton, Ohio, USA. That is, the material of the can cover itself is processed to form a rivet, and a pull ring is attached to the cover and then riveted tightly, with appropriate notches to form a complete can cover. This genius invention brought a historic breakthrough to metal containers after 150 years of development. At the same time, it also laid a solid foundation for the development of canning and beverage industries. Cans originated in the United States and are popular in the United States