Most of the glass beer bottles are green, which is related to the glass manufacturing process of adding iron oxide.

During the glass manufacturing process, in order to change the color of the glass, different oxides can be added. Among them, adding iron oxide can make the glass appear green. This process is widely used in the manufacture of beer bottles, so most glass beer bottles appear green. This green glass not only has a beautiful appearance, but also has some practical functions. First of all, green glass can filter out part of the ultraviolet rays, thereby reducing the possibility of beer reacting with ultraviolet rays and helping to protect the quality of the beer. Secondly, green glass has more advantages in light transmittance than other colors of glass. It can allow an appropriate amount of light to penetrate into the bottle, making the beer look clearer and brighter, and providing a good display effect for the beer.