1, plastic thermal insulation liner: the thermos bottle of plastic thermal insulation liner only has thermal insulation function, and the thermal insulation time is only about 3 hours.

2, ceramic insulation liner: ceramic insulation liner is completely harmless, it will not produce harmful substances like plastic insulation liner, nor will it release a lot of heavy metals like metal insulation liner.

3. Zisha thermal insulation liner: Zisha thermal insulation liner has thermal insulation function, and some better Zisha also has health care and conditioning functions.