What kind of cup is the healthiest for drinking water?

First, don't drink coffee in a metal cup. Metal cups, such as stainless steel, are more expensive than ceramic cups. Metal elements contained in enamel cups are usually stable, but in acidic environment, metals may be dissolved out of cups made of metal. Therefore, it is unsafe to drink acidic drinks such as coffee and orange juice with these cups, because eating dissolved metals is harmful to people. Second, disposable paper cups may hide carcinogens. Disposable paper cups look sanitary and convenient. In fact, the product qualification rate can not be judged, and whether it is clean or not can not be identified with the naked eye. From the perspective of environmental protection, disposable paper cups should be used as little as possible. Some paper cup manufacturers add a lot of fluorescent brighteners to make the cups look whiter. It is this fluorescent substance that can mutate cells, and once it enters the human body, it will become a potential carcinogen; Secondly, those unqualified paper cups are generally soft and easy to deform when poured into water. Some paper cups are poorly sealed, and the bottom of the cup is easy to seep, which makes it easy for hot water to burn your hands. What's more, if you gently touch the inside of the paper cup with your hand, you can feel fine powder on it, and it will turn white when you touch it with your fingers. This is a typical inferior paper cup. Third, plastic cups are the easiest to shelter evil people and shelter evil people. Fourth, use colored cups to be careful of heavy metal poisoning. Colorful cups are attractive, but it's best not to use them. Because those bright pigments have great hidden dangers, especially when the inner wall is glazed, when the cup is filled with boiled water or drinks with high acidity and alkalinity, toxic heavy metal elements such as lead in these pigments are easily dissolved in the liquid, and people will do harm to the human body if they drink the liquid containing chemicals. 5. The healthiest glass is glass. Among all the cups made of materials, the glass is the healthiest. This kind of glass contains no organic chemicals in the firing process. When people drink water or other drinks from glasses, they don't have to worry about chemicals being drunk into their stomachs. Moreover, the glass surface is smooth and the glass wall is transparent, so it is easy to find dirt, and it is easy to clean if there is dirt. Bacteria and dirt are not easy to breed on glass walls, so it is the healthiest and safest for people to drink water from glasses. However, although glass contains no chemicals and is easy to clean, users can easily burn themselves because of the strong thermal conductivity of glass materials. If the water temperature is too high, the glass may burst, so try to avoid holding hot water. Sixth, the ceramic cup coated with colorless glaze is not only warm but also safe to drink. Ceramic cups coated with colorless glaze are preferred, especially the inner wall should be colorless. This material is not only safe and resistant to high temperature, but also has a good thermal insulation effect. Drinking hot water or tea is a good choice.