Excellent chemical stability and low-expansion rate. Borosilicate glass is stronger and more heat-resistant than regular glass. The resistance to extreme temperature and acids of borosilicate makes it perfect for use of coffee and tea maker. It is ideal for use in ovens, microwaves, refrigerators, dishwashers, and on the cooker. Products made of borosilicate glass are neutral in odour and taste, they are handmade by expert artisans, crystal clear, beautiful and non-poisonous. A better choice for green and healthy living.