The conversation between human and AI assistant.
What are glass bottles made of?
Yes, why do some glass bottles have a green tint to them?
The green tint on some glass bottles is caused by the presence of iron impurities in the raw materials used to make the glass. The iron reacts with the glass during the manufacturing process, which creates the green color. This is especially common with bottles used to store beer or wine. Do you have any other questions?