What are the correct ways to use the thermos cup?

The use method of the thermos cup mainly includes the following four aspects:

1. Before use, unpack it first, and then scald it several times with boiling water or add some edible detergent for high-temperature disinfection;

2. Do not fill the water too full to avoid hot water burns;

3. It is not suitable to hold milk, dairy products and carbonated drinks such as fruit juice for a long time;

4. When cleaning, it is advisable to use a soft cloth and edible detergent diluted with warm water. Do not use alkaline whitening agent or chemical rag.