Whether putting ice cubes in hot water is healthy for people is to add it to boiling water.

Electric kettle, or drinking machine. There are many kinds. If you want to have cold/hot water anytime and anywhere, the water dispenser is better, but it takes up space and needs to be changed. An electric kettle is full of water, and there is hot water at any time, but if you want to drink cold boiled water, you must dry the water in advance. Moreover, in order to keep the water temperature heated for a long time, this kettle is easy to be bad for the body (it is easy to produce heavy water). There is also an electric kettle that is used in general hotels. It is very small, only enough to drink a few cups at a time, but it burns quickly and can be cooked in less than two minutes. But if you want to drink cold water, you have to dry it or add ice ... So ... it's very troublesome ... We have a big electric kettle at home, and then we pour it out to cool it down, and then we pull it out, and there is a little water left in it, so we can plug it in when we want to drink hot water. At this time, it is boiling, because there is not much water in it ... but it is still very troublesome. ...