What is Pyrex?
What is Pyrex? Pyrex is simply a name brand of a particular glass formula properly known as Borosilicate Glass. Borosilicate glass is a type of glass with the main glass-forming constituents being silica and boron oxide. Boro(for short) has a very low COE (Coefficient of thermal Expansion) which makes this glass formula unusually resistant to Thermal Shock. Here at Eco-Straw.com we [...]