3C is an electrical safety standard, and the provisions and requirements for materials are relatively general. In GB4706. 1-2005, it is only mentioned that "the appliance should not emit harmful rays or appear toxic or similar dangers". Therefore, labels 304 and 430 are unacceptable. People all over the world know that 403 can't be used as a container for heating ingredients, but 304 can. However, even if there is a label of 304, can it be guaranteed that it is a real 304? Trust your own choice rather than your own conscience. An electric kettle without metal is finished. Is the beaker glass in the laboratory unsafe? All-glass made of this kind of glass can be used safely.