What material was the essential enamel for every family when they were young?

Enamel is composed of two main materials: metal and clay. The process of making enamel is to coat a layer of porcelain clay on metal objects (such as iron and steel), and then heat and sinter it to firmly bond the porcelain clay to the metal. This forms a layered structure on the enamel surface. The metal provides the structural support of the cup, while the enamel layer brings smoothness, wear resistance, heat preservation, and other properties.
The production process of enamel can be traced back to ancient times, but modern industrial production technology has made enamel a popular product. Enamel cups are usually made of iron or steel as a base material and then coated with an enamel layer. This production method makes enamel cups relatively affordable while also providing high durability and durability.
Therefore, the family enamel cups used in childhood are composed of metal and porcelain clay. The metal provides strength and structure, and the enamel layer makes the cups smooth, wear-resistant, and corrosion-resistant.