This Tang Dynasty, late seventh century ewer is from China. Interestingly, the three color glaze identifies its purpose. That is to say, the color of the vessel tells you what it was used for. In terms of shape, it is thought to have been influenced by Iranian metalwork of the time. The shape isn't traditional. It is the colorful glaze that is traditional and indicative of the use.
I wonder sometimes if they ever let you repaint the ewers, when say your dinner plans changed.