Which cups are best not used to drink coffee?

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 buying plastic cups, we must choose the water cups made of edible grade plastics that meet the national standards.