The glassmaker picks the molten material from the pot furnace with a hollow metal rod. To give a round shape to the glass mass, the worker uses a wooden or metal tool, the mallet. Once blown, the object is detached from the cane by a slight shock and falls onto a sheepskin which prevents it from breaking. In the past, glassblowers were allowed to produce objects for their own use during their rest periods. They would then make things that were sometimes successful, sometimes unsuccessful. This was called “bouzillage”. The French verb ‘bousiller’ (to do a job roughly and very quickly) comes from this.