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It is best not to consume more than half a liter of bottled water per day. When choosing bottled drinking water, make sure to select bottles with an appropriate thickness that do not deform easily when squeezed. It is best if the transparency of the bottle is natural; some plastic bottles that are too transparent may contain clarifiers containing bisphenol A, a substance that can have adverse effects on pregnant women and children. Furthermore, colored bottles may contain certain heavy metal compounds, and once these dissolve in water, they can also affect the health of those who drink it. Qualified bottles will have no impurities or dark spots. All qualified drinking water packaging equipped with pre-filters will have a QS mark as well as a qualified product number, which people should pay attention to when making purchases. Mineral water is more easily absorbed by the human body than water enriched with minerals. Mineral water is unpolluted groundwater that emerges naturally from great depths underground; water enriched with minerals is generally made by processing urban tap water into pure water and then adding mineral-based food additives, and it cannot be effectively absorbed by human cells in the same way as natural minerals present in water. Therefore, mineral water cannot replace spring water, and it is also unreasonable to rely solely on mineral water to supply the body with the necessary elements. From a health perspective, the daily consumption of various mineral waters, spring waters, and purified water should not exceed 500 milliliters. It is better to drink plain water regularly; bottled or barreled water should be used as a supplement to tap water.