What is the best material for the water cup liner? What is the safest material for the inner container of the thermos cup?

1. The inner container of purple sand thermos cup is made of better material.

2, purple sand thermos cup, this material has the function of heat preservation, and a 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 burn.

3. 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 may cause cancer.

4, ceramic insulation liner, this material liner is completely harmless, unlike plastic liner with more harmful substances, and will not release more heavy metals like metal cups. Ceramic thermos cup liner is a kind of less commonly used material, which is relatively rare in the market.