glass blowing

CIDE DICTIONARY

glass blowing, n. 

 The art and process of creating glass objects, by shaping glass when reduced by heat to a viscid state, using various manipulations with the hands, especially by inflating it by blowing through a tube. The process is used to manufacture a wide variety of useful and ornamental objects. The manufacture of simple glass objects has been automated, but complex glass objects are still made by the traditional hand processes.  [PJC]