. Jacob Sang, originally from Erfurt, was the most important glass-engraver working in Amsterdam in the mid-18th century. The high quality of his wheel-engravings is evident in the wealth of details, such as the pipes on the table and the earrings worn by the lady at centre. The glass was used to toast to friendship, as the people depicted on the vessel are doing.Translation of inscription: He who excludes friendship from this Life / Banishes the sun from the world.