Stainless steel: the stainless steel thermos cup is made of food grade 304 stainless steel, and the country also has clear instructions. Stainless steel contains some iron, but some inferior stainless steel will also release some toxic heavy metals. Stainless steel thermos cups are not suitable for making tea, which will lose the fragrance of tea.

Glass thermos: This is a healthier cup, but it is not resistant to falling. The substance of glass is relatively stable and will not leak impurities because of boiling water. Glass cups are easier to clean, but not easy to carry around.

Matters needing attention in using thermos cup

When cleaning, use a soft cloth and an edible detergent diluted with warm water. Do not use alkaline bleach, metal core cloth, chemical rag, etc.

The inside of stainless steel cup sometimes produces some red rust spots, which is due to the influence of iron and other substances in the contents. After soaking in warm water and diluted vinegar for 30 minutes, it can be fully cleaned to prevent odor or stains, and can be used cleanly for a long time. After use, please clean it and make it fully dry.

Refer to the above? Baidu encyclopedia-thermos bottle