Slab built jug made of white earthenware... leather hard. I made some dark blue terra sig a few days ago, and I think I will use it on this bottle. I may add some floral patterned sgraffito to it also. I'll give it a good look once the terra sig is dry, and see if it will let me (ha). I am discovering that you can't force a design or decoration idea onto a piece when everything is telling you it shouldn't be there. Sometimes you just have to know when to sit it aside and leave it alone. It may just be a blue bottle, which would be fine. I've got more of these in the works.