Drinking taboo
Don't drink raw water, because chlorine in tap water will interact with residual organic matter in boiling water, leading to diseases.
Don't drink water that has been left for a long time. Such water not only has no minerals, but also may contain some harmful substances, causing poisoning.
Cold boiled water, but it is best not to drink water that has been left for more than 24 hours, because if it is left for too long, it will produce a lot of bacteria and other substances.