The inner container of ceramic thermos cup is colorless glazed, which has the characteristics of high temperature resistance and heat preservation, and is a good choice for drinking water or tea. The inner liner of this material is completely harmless, and it will not contain many harmful substances like plastic, nor will it release many heavy metals like metal cups. The inner container of ceramic thermos cup is a kind of less commonly used material, which is relatively rare in the market.
Second, the comparison of several other common thermos cups on the market at present is as follows:
1, plastic thermos cup, which is a common and widely used material. The thermos cup made of this material can only play the role of heat preservation, and the heat preservation is only about 3 hours at most. The insulation effect of plastic thermos cups is very poor, so it is generally not suitable for use in autumn and winter. Long-term use of plastic cups is likely to cause cancer.
2, purple sand thermos cup, this material has the function of heat preservation, and some better purple sand also has the function of health care and conditioning. The purple sand liner is often matched with the stainless steel shell, which can improve the service life of the purple sand cup. Purple sand has good thermal insulation, slow heat transfer and is not easy to heat.
3, glass thermos, this is a healthier cup, but it is not very 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.
4, stainless steel thermos cup, should use food grade 304 stainless steel, the country is also very clear about this. 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.
Conclusion: Some colored thermos cups are easy to dissolve heavy metals, so it is very dangerous to use this plastic cup for a long time. Glass cups are the healthiest choice. The firing process contains no chemicals and is easy to clean. The ceramic thermos cup with colorless inner wall is safe, and colorless glaze is selected. This material has the characteristics of high temperature resistance and heat preservation, and is a good choice for drinking water or drinking tea.