I originally got the idea from a magazine and tried to recreate it. My piece roughly looks like the one I saw. I like how mine turned out but it looks like a cornucopia. First, I rolled out a slab of clay and kind of rolled it up, making sure one side was open and the other side was closed. In order to keep its shape, I stuffed it with newspaper. Once the piece had hardened a little, I added texture by scraping lines along it. After that, the piece was fired and I used water color to paint it. A lot of green and blue was incorporated in order to give it a beachy feel.
Pinterest board: https://www.pinterest.com/britt_hallenber/vessels/
Pinterest board: https://www.pinterest.com/britt_hallenber/vessels/