There are many kinds of glass, the raw materials used are different, the melting process is different (such as quartz glass, crystalline glass melting temperature is much higher than sodium calcium silicon glass), the physical and chemical properties of products are also very different. Daily bottle glass belongs to sodium-calcium-silicon glass (including most of the salt water bottles produced today), that is, the basic composition of SiO2, Na2O, CaO, MgO, Al2O3 glass, and then the combination of all components is put into the furnace for melting.