It's completely drinkable. Because water is suitable for life, it has five characteristics: weak alkalinity, small molecular groups, high oxygen content, negative potential and minerals. Weak alkalinity can neutralize acidosis in the body, small molecular groups have strong solubility and permeability, and high oxygen content can activate cells! So old people can drink it often. But I suggest that if it's for the elderly, you'd better go to Shuiyisheng Store. Because there are many counterfeit products on the market. The price is cheap, but the effect is not good. Some cup cores are made of cement, so there is no reaction. So try to buy genuine products. Although the price is high, but rest assured, after-sales guarantee! !