Mineral water after the expiration date can not guarantee the safety of water quality, it is not recommended to drink. Most of the mineral water on the market is not vacuum-packed, expired mineral water in the storage process is easy to deteriorate and ionic composition changes, after drinking may cause a certain degree of impact on the body. For the use of plastic bottles of expired mineral water, the packaging may release microplastic particles and other chemicals into the water, which may affect water quality, for frequent use of plastic bottles, as opposed to single-use plastic bottles are more likely to make the water quality is affected. In addition, for mineral water that has been opened for a long time out of date, the water will react with carbon dioxide in the air, while bacteria or mold floating in the air may also multiply in the water. For plastic bottles and open expired mineral water drinking may cause abdominal pain, diarrhea and other uncomfortable symptoms, so it is not recommended to drink. Therefore, if the situation allows, it is recommended to choose to drink mineral water within the shelf life and the appropriate temperature, and try to drink within 1 day after opening the bottle. In the absence of suitable drinking water, if you drink expired mineral water, you should reheat and boil it, and then drink it after effective sterilization. If you accidentally drink expired mineral water, you can temporarily observe whether the body has obvious discomfort, such as abdominal pain, diarrhea, nausea, vomiting and other digestive discomfort, once the obvious reaction to seek medical attention to avoid adverse consequences.