How to choose a good thermos cup?

The temperature is getting cooler, and the number of people around you who say "drink more hot water" is increasing. It's time to drink more hot water
It is really very good for the body, moistening the throat, preventing heat, moistening the spleen and lung.
But before you drink hot water, you'll need only a thermos cup, especially if you're out and about a lot. The hot water will soon cool down
Now, how can I do without a thermos?
Nowadays, the types and brands of vacuum cups on the market are mixed. As consumers, what we need to do is to choose a type with good quality and heat preservation
A warm thermos cup with good performance and suitable for your own. What should we pay attention to when choosing a thermos cup at ordinary times? Today, Xiaobian will come.