What is the safest and healthiest thermos cup?

304 stainless steel.

The advantages of this stainless steel are high strength, stable performance, strong acid and alkali resistance, and qualified products are harmless to human body. Some inferior products with lower prices may use stainless steel of other specifications. Although these products may have disadvantages such as poor color, light weight, softness and hardness, which will not affect their basic use, there may be potential hazards such as excessive or precipitation of heavy metals, which will affect human health.

Related information:

General stainless steel thermos cups are simply insulated by the vacuum insulation principle between two layers of stainless steel. Some brands of thermos cups are plated with copper on the outer wall of the inner container, and the good heat gathering effect of copper is used to improve the thermal insulation performance.

The first thing consumers need to pay attention to when buying thermos cups is health. Because consumers can't directly identify the material of the thermos cup like experts, it is best to choose qualified regular brand products when purchasing.

People's Daily Online-Pay attention to material information when buying thermos cups.