As an expert in the field of food and beverage science, I can provide you with information on the shelf life of bottled alkaline water.

Bottled alkaline water, like any other bottled water, is generally considered safe to consume as long as it remains unopened and is stored properly, typically at room temperature and away from direct sunlight. The shelf life can vary depending on several factors, including the composition of the water, the quality of the bottle, and the conditions in which it's stored.

Manufacturers often print expiration dates on the bottles, which can range from two to five years. However, these dates are more about the integrity of the bottle and seal rather than the water quality itself. Once opened, it's recommended to consume bottled water within two weeks, as the risk of bacterial contamination increases once the bottle has been exposed to the environment.

Here's the information in English, followed by the translation in Chinese:

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The antioxidant (the lower the ORP, the better) last approximately 18-24 hours. The Higher pH will last approximately 1-2 weeks. The smaller molecule cluster size of its water will last approximately 1-3 months. So you see, bottling alkaline water makes no sense, because the antioxidant power is gone after 24 hours.read more >>