Andy Paiko is a U.S. artist who blends form and function in his glass pieces.
Check out both his "Sculpture", as well as "Sculptural Vesselware" on his website, for striking designs, some holding organic shapes. I really like how layered and ornate the work is - a jar that only needs to be five inches tall has a gigantic layered finial on top, just to show off. Glass is a beautiful and difficult medium to work in, and I really appreciate this artist's work.
Special thanks to DF reader CuriousArt who turned me on to Andy's work!