① Unless special material protection is used, the insulation cup can only be filled with water in principle. It is not suitable to store foods with strong acidity for a long time, such as juice, lemonade, carbonated drinks, etc., because it is easy to move out of heavy metals; it is not suitable for making tea and carrying Chinese medicine. Hot milk. (except for the bottle, it can be used directly)
② When cleaning the vacuum flask, do not brush the surface of the liner with a steel ball. For stains that are difficult to remove, rinse with a neutral detergent or wash with diluted vinegar (washing time should not be too long to avoid breaking the passivation film). ), as well as professional cleaning agents.