It is not pure water, it is activated carbon filtered water. The merchant claims that it has added negative oxygen ions and is also weakly alkaline. I have been drinking it and it feels good. This water does not hang on the wall because there is no surface tension to form a wall. The particle coagulation nuclei required for wall water droplets indicate that the filtration is more thorough. When making milk for your child, you need to boil it because it needs to be sterilized and bacteria cannot be filtered out.