Does the subject want to ask, "What is the reason why the Diaoyutai health bowl changes color when it meets hot water?" The bowl is made of temperature-sensitive material. Diaoyutai health bowl will change color when it meets hot water because the bowl body is temperature-sensitive material, and it will change color when the temperature gets higher. Temperature-sensitive materials belong to temperature-sensitive materials, which are resistant to 320℃, non-toxic, lead-free and chromium-free.