The tulip vases were made like that because the potters weren’t able to make the vase out of one piece around 1700; it would collapse while firing it. Tulips were introduced in the Netherlands at the end of the 16th century; the bulbs came from Turkey, and became a very expensive, fashionable flower. At the peak of the “tulip mania” in february 1637, a canal house in Amsterdam was cheaper as a tulip bulb. Such an expensive flower needs to be presented in a nice vase that displays every tulip on its own. To this day tulips are very popular flowers.