These are stoneware, wheel-thrown, canisters produced by a pair of artists (Robert throws, Emily glazes) at Promethean Pottery in Gainesville, Florida. The forms are nice and I like the ridges as a simple way to add interest. But what I really like are the glazes. They have a number of pictures on their blog (prometheanpottery.wordpress.com/) showing Emily's different glaze experiments. In particular, I like Emily's Mossy Mahogany. It is both rich in color and texture and I like the way it flows on the canisters above. Glazes with that much variation can greatly enhance simple forms.