Tools for lampworking are similar to those used in glassblowing. Glass welding is a common practice during glassblowing. In the 1st century BCE glassblowing techniques flourished in Phoenicia. In 2000, after giving a glassblowing demonstration at WUSTL, McKelvey met Doug Auer. The series, which pits glassblowing craftsmen against one-another in the competition TV genre. Goblets and pitchers were popular as glassblowing developed as an art form. The bubble is then blown using traditional glassblowing techniques. A marver is a tool used in glassblowing. BGSU is one of only a few schools that offer degrees in glassblowing. A full range of glassblowing techniques was developed within decades of its invention. The two major methods of glassblowing are free-blowing and mold-blowing. This state-of-the-art teaching facility for glassblowing and coldworking opened for classes in 1996. There are also specialized glassblowing tools to unfreeze the joint. To this day it is used in the manufacture of smoking and glassblowing mouthpieces. As with cataracts not associated with glassblowing, symptoms typically have a gradual onset.