Although the shelf life of glass bottles is relatively long, but also can not be used for a long time, or need to be replaced regularly. Glass bottles are easy to clean, and the material is safe, so there are generally no harmful substances, and in most cases, they can be replaced once a year. However, in the process of using the bottle, you must develop good hygiene habits and wash the bottle thoroughly after each feeding to avoid bacterial growth. Shake out the water inside and keep it in a place where it can be isolated from dust, waiting for the next use. Because glass bottles are easily broken, pay attention to safety in the process of using them to avoid damaging your baby because of minor damage to the bottle that is not discovered in time.