How to use a vacuum flask? Can the mug be made of tea? The mug manufacturer teaches you how to use the mug. Especially the older generation of the family, who love to bring a thermos cup, and then put tea in between, to make tea. Some even soaked for 2 days, the tea in the cup has not been changed, and the tea cup has not been cleaned. In general, there is no safety question when using a mug to make tea. But the best way to make tea is not to use a thermos cup.

Generally speaking, even if it is kept at a low temperature after opening, it should not be crossed for half a day. If the hot milk is placed in a thermos cup, it is like a petri dish, which will soon change and should be prevented. If you keep cold for a short time, there is not much doubt. Soda can't be filled with a thermos bottle, and it is dangerous to put the soda in a rigid container. As far as the degree of cleanliness is concerned, even if only boiled water is installed, the thermos cup needs to be cleaned once a day, otherwise the warm environment will cause the bacteria to multiply.