Murano was made world-famous mostly by this technique.
Blowing revolutionized the glass production around the middle of the 1st century. The production of glass containers was fast and had a low cost, therefore favored and used not only by the rich, but also the lower classes.
To begin the blowing process, one end of metal rod is inserted into the crucible, or melting pot, and the necessary amount of incandescent glass is taken up on the rod. The Glassmaster then carefully blows through the rod from the other end.
The Masters seem to perform the blowing process with such ease, and simplicity, but years of experience are needed to learn this delicate technique.