Advantages and Disadvantages of Milk Bottle Glass As a traditional milk bottle material, glass milk bottles have their own unique advantages and disadvantages. The advantages are: environmental protection and health: glass is a natural and harmless material, does not contain carcinogens such as BPA, and does not release toxic substances, so it is very safe. In addition, glass baby bottles have a very long service life and can be washed and used repeatedly without being damaged or deformed like plastic bottles. Easy to observe: The glass has high transparency, so mothers can observe the liquid state in the bottle at any time, which is convenient