*Prices are changeable according to different demands, exchange rates, and print design.
This product uses borosilicate glass, which is the purest and safest material in contact with water. With super chemical stability: acid and alkali resistance, and corrosion resistance. Therefore, there is no need to worry about the release of any harmful and toxic substances when drinking. Unlike other crystal glassware that must contain at least 20% lead by definition, this double borosilicate glass coffee cup and teacup are 100% lead-free. Top-quality – this double glass coffee cup is made of mouth-blown, laboratory quality borosilicate glass, which is scratch-resistant and more durable in daily use – can be safely heated in the microwave or frozen in the refrigerator, making the product smooth and smooth without any rough or abnormal spots.