When glass is in a melted state, it can be “worked” in many ways. It can be blown, pressed, drawn, or rolled. For hundreds of years, the chief method of working with glass was blowing. The glass-worker gathered a ball of molten glass on the end of his blow-pipe and blew, just the way you would blow a soap bubble. Using his skill, he shaped the glass as he blew, and drew it out to the correct thinness. He kept reheating the glass to keep it workable, and then he would finish it with special tools.