1, plastic insulating gasket
Plastic thermos cup liner is a common material. The thermos cup made of this liner material only has the function of heat preservation, and the heat preservation time is only about 3 hours.
2, ceramic insulation liner
Ceramic thermal insulation liner, which is completely harmless, will not contain a lot of harmful substances like plastic, nor will it release a lot of 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.
3, purple sand insulation liner
Kettle with purple sand insulation liner, this material has insulation function, 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.
4, glass insulation liner
The kettle with glass insulation liner is a relatively healthy kettle, 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.
5, stainless steel insulation liner
The thermos pot with stainless steel insulation liner generally adopts food-grade 304 stainless steel, which contains some iron elements, but some inferior stainless steel will also release some toxic heavy metals.
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