The shelf life of bottled purified water is generally 1-2 years. The longest shelf life of unopened bottled water is only 15 days, and the best drinking time is 5~7 days. If the bottled water in Kaifeng is left for more than half a month, although the taste has not changed, the bacteria have exceeded the standard.
Shelf life of other water The shelf life of boiled water is only about 1 day. 1 day here refers to water in a thermos. However, it only takes about 16 hours to open the cold white tea. Shelf life of purified water: Generally, purified water does not contain bacteria when it is packaged, but it will be polluted when it is opened for the second time. Therefore, if the purified water lasts for more than 5 days, it is best to heat it before drinking.
Shelf life of mineral water: the shelf life of unopened mineral water is about one year, but only about five days after opening. However, because mineral water contains a lot of minerals, it can't be heated, otherwise it will cause mineral precipitation and lose its health care function. Therefore, mineral water is not suitable for drinking for more than 5 days after opening.
Shelf life of magnetized water: magnetized water can be divided into artificial magnetized water and natural magnetized water. Generally, artificially magnetized water is treated with a magnetizer, but the magnetism of water is very weak. The shelf life of this kind of water is no different from that of pure water.