Don't drink coffee from a metal cup.

Metal cups, such as stainless steel, are more expensive than ceramic cups.

The metal elements in the composition of enamel cups are usually stable, but they may be dissolved in acidic environment, so it is not safe to drink coffee, orange juice and other acidic drinks.

Disposable paper cups or hidden potential carcinogens

Disposable paper cups only look hygienic and convenient, in fact, the qualified rate of the product can not be judged, whether it is clean and hygienic, can not be recognized with the naked eye. From an environmental point of view, disposable paper cups should be used as little as possible. Some paper cup manufacturers add a lot of fluorescent brightener to make the cup look whiter. It is this fluorescent substance that can cause cells to mutate, and once it enters the human body, it will become a potential carcinogenic factor; secondly, those unqualified paper cups are generally soft and easy to deform after being poured into water, while some paper cups are poorly sealed and the bottom of the cup is easy to seep, which makes it easy for hot water to scald hands. What's more, when you gently touch the inside of the paper cup with your hand, you can feel the fine powder on it, and the touch of your fingers will turn white. This is a typical shoddy paper cup.

Plastic cups are the easiest to hide dirt.

Plastic cups should also be unpopular. Because plasticizers are often added to plastics, which contain some toxic chemicals, when hot water or boiled water is filled with plastic cups, toxic chemicals can easily be diluted into water, and there are many pores in the internal microstructure of plastics. there are hidden dirt, cleaning is not clean will be easy to breed bacteria. Therefore, when choosing and buying plastic cups, we must choose the water cups made of edible-grade plastics in line with national standards.

Beware of heavy metal poisoning when using colorful cups

The colorful cups are attractive, but you'd better not use them. Because there are huge hidden dangers in those bright pigments, especially the inner wall is coated with glaze, when the cup is filled with boiled water or drinks with high acidity and alkalinity, the toxic heavy metal elements such as lead in these pigments are easily dissolved in the liquid. People drink liquids with chemicals, which will do harm to the human body.

The healthiest material-- glass

Of all the cups made of material, the glass is the healthiest. The glass does not contain organic chemicals in the firing process, and when people drink water or other drinks from the glass, they do not have to worry that the chemicals will be drunk into their belly, and the glass surface is smooth and easy to clean. Bacteria and dirt are not easy to breed on the walls of the glass, so it is the healthiest and safest for people to drink water from the glass.

However, although the glass does not contain chemicals and is easy to clean, it is easy for users to burn themselves because of the strong thermal conductivity of the glass material. If the water temperature is too high, it may also cause the cup to burst, so try to avoid filling hot water.

The ceramic cup without colored glaze is not only insulated but also safe.

The first choice for drinking water is the ceramic cup without colored glaze, especially the inner wall should be colorless. Not only the material is safe, can withstand high temperature, but also has a relatively good heat preservation effect, drinking hot water or tea is a good choice.