A necessity of good hygiene in the medieval Islamic world was a pleasing scent, achieved by burning incense and wearing perfumes made of essential oils and crushed herbs. The oils were housed in small glass sprinklers, like this marvelous striated bottle, which may have been carried on the body, as examples of this type with handles were once suspended from a belt or necklace. The practice of perfuming spread from the Muslim markets to Europe after the eleventh century.