There is no such thing as “bottled water is not suitable for long-term drinking”. Qualified bottled water can be used as one of the safe long-term drinking water.
Barrel-filled water is usually purified water in barrels, and the risk mainly comes from the water dispenser connected to the barrel, which is exposed to air and suitable temperature for a long period of time, which can easily lead to the propagation of pathogens such as Staphylococcus aureus, Escherichia coli, and Salmonella, which can lead to food poisoning.
It is recommended that barrels of water should be consumed as soon as possible within 3 to 5 days after opening and that drinking fountains need to be sterilized on a regular basis, as this can easily lead to contamination of the water source, which can lead to health risks.
Another problem with bottled water is that it is pure water and lacks calcium, potassium and other minerals contained in plain water, which may increase the risk of mineral deficiencies when consumed over a long period of time.
Therefore, whether from the safety or health point of view, plain water is more suitable as a long-term stable water source for human consumption, and it is easier to obtain and less costly.
However, bottled water is still one of the ideal choices of water source in some public places, and you can choose a specific source of drinking water according to your specific situation.