Glassblowing is an ancient art form that has been practiced for centuries. It involves the use of a furnace to heat glass, and then using tools and techniques to shape and form the molten glass into a variety of objects. Glassblowing is an art form
From Wikipedia
Glassblowing is a glassforming technique that involves inflating molten glass into a bubble with the aid of a blowpipe. A person who blows glass is called a glassblower, while the head of a glassblowing workshop is known as a gaffer. A lampworker manipulates glass with the use of a torch on a smaller scale, such as in producing precision laboratory glassware out of borosilicate glass.