After using the thermos for a long time, be careful to clean the liner. There are several ways to do this: Add 50g of baking soda to a cup of water, pour it into the bottle and gently shake it. The scale can be easily removed.
It used to be milk in a thermos cup. After a long time, drinking it will cause diarrhea. I believe many people didn't know it before. In fact, many parents will also make such mistakes, using a mug to bring hot milk to the school. Parents will pay more attention in the future, in fact, in addition to milk, the following four kinds of water can not be used in insulated cups!
Holding a thermos flask is a common phenomenon in our life, but if the mug is used incorrectly, it will endanger our health. Next let us see what can't be put into the thermos?