The best water to drink for a long time is boiled water. Pure water. Mineral water. These are all suitable for long-term drinking. Mineral water is the best water to drink. But natural mineral water is very precious. Plus, there is water pollution everywhere now. There is not much good water. So I think. The most suitable water for long-term drinking is boiled water. You can boil the tap water. To drink. In boiling tap water. You won't give up bad substances. There is no harm to the body. Since there is no damage. It won't cost much. Drinking nature often is also a good thing.