Is it harmful to drink hot water from a high-borosilicate glass cup?

Drinking hot water from a high borosilicate glass cup is not harmful. The detailed analysis is as follows:

High borosilicate glass is a new type of glass material characterized by high boron, high silicon, and low alkali content. It does not contain heavy metals or other hazardous substances, which is why it is widely used in the production of high-end tableware and tea sets. High borosilicate glass cups have smooth surfaces that are easy to clean and resistant to dirt buildup. They also exhibit excellent heat resistance and can withstand exposure to hot water at high temperatures. Therefore, drinking hot water from such cups poses no health risks. The main components of high borosilicate glass include borax, quartz sand, and sodium carbonate—none of which release harmful substances or pose any danger to human health. Moreover, due to their superior thermal resistance, these glasses do not produce harmful substances when exposed to high temperatures and thus do not adversely affect the body.

It should be noted, however, that if a high borosilicate glass cup becomes cracked, scratched, or deformed, it should no longer be used, as this could pose a risk of injury. Additionally, although high borosilicate glass itself contains no harmful substances, certain chemicals may be used during the manufacturing process. Therefore, when purchasing such products, it is important to choose reputable brands and reliable sources to ensure product quality and safety.