This unguentarium is a typical glass vessel of the Roman period, which is preserved intact and was found at the city of Kozani. The vessel has a square foot with a circular concavity at the bottom while its body is tall and square. It has a conical neck with a small rim that is attached on the curvy shoulder of the vessel. The art of glassblowing was invented at the beginning of the second half of the 1st century in some of the traditional workshops located in the eastern Mediterranean. The glass was melted in furnaces from the raw ingredients of sand, limestone, soda, potash and other compounds. The technique spread along the Roman Empire, due to the fact that the production of glass vessels was now possible in larger quantities at a smaller cost. So, glass vessels were widely used without being considered a luxury.