Christmas decoration
A clear glass tube is heated over an open flame. It is then inserted into a mold. The glassblower then blows into the end of the tube. The glass expands to fill the mold. The glass takes on the shape of the mold. It is cooled. A silver nitrate solution is swirled about inside the ornament. This gives the ornament a silver glow. The outside of the ornament is painted or decorated with metal trims, paper clippings, etc.