The shelf life of bottled water with different brands and different qualities varies greatly before and after opening. Some may require drinking within 7 days after opening the bottle, while others may require drinking within 10 days after opening the bottle. In addition, the shelf life of bottled water after opening is also related to temperature. Generally winter is 3-7 days longer than summer.
Because bottled water will come into contact with air when it is opened for a long time, as well as hands, cups, water dispensers and so on. Contact with sealed bottled water is also easy to cause secondary pollution, leading to large-scale growth of bacteria. After opening 10, the total number of bacterial colonies in drinking water will exceed the standard. Drinking bottled water with excessive microorganisms for a long time will cause abdominal pain, diarrhea, vomiting, dizziness and other symptoms.
Precautions for drinking bottled water:
1. It is recommended to boil the bottled water after opening the bottle for 3 days, which can effectively kill the bacteria growing in the bottled water.
2. Don't put the bottled water in direct sunlight after you buy it, because the bottled water is made of PET and food-grade PVC, which may melt and decompose at high temperature and produce harmful substances. But it won't be a problem if it is placed in a place that is not at high temperature.