The three-piece can, also known as the tinplate three-piece can, is a can-shaped packaging container made of thin metal plates such as tin-plated thin steel plates, chrome-plated steel plates or aluminum alloys through crimping, bonding or resistance welding. It consists of three parts: the can body, the can bottom and the can lid. Its application history can be traced back to the 19th century and it is widely used in the sealed packaging of food, beverages, chemical products and spray products.

The application logic of the three-piece can always revolves around "matching the characteristics of the contents with packaging performance" - whether it is the "long-term shelf life" of food, the "pressure resistance and anti-oxidation" of beverages, or the "anti-corrosion" of chemicals, its structure and material design precisely meet the core needs of different industries, becoming a classic form that combines "universality and professionalism" in the packaging field.