Thank you Aardvark,

Yes, clay is great. It's just not precise so that's why I was thinking of 3D Ceramic printing. I just don't know if it is feasible. I was checking out Nylon PA12 in grey and it looks rather attractive.

What I'm trying to find out too is if there is a material with incredible thermal properties. Is there a way to keep water cold in a vessel on a hot summer day? Or will I have to make a double-wall vessel with insulation like I did with the ceramic fountain above?