He works with borosilicate, also known as “hard glass”. It takes between 3,000 – 5,000 degrees Fahrenheit to melt and shape this glass. After a piece is finished it is put into a kiln (oven) at 1,000 degrees Fahrenheit to aneal (harden) the glass. Because of this the jars are much stronger than standard glass and will last a lifetime.
Take a look at the pretty designs, admit that you want one! 😉