I'd love to have a whole set of these, but just found this one, which could be used as a cup, or a small bowl (for rice, say, or ice cream!), or as a succulent planter. I just find it a pretty perfectly wabi-sabi thing, with the great funnel shaped form glazed a great ochre-mustard with shiny black over top, over which the ochre has dripped on one side. 

3 1/8" t x 4 9/16" across at lip. Very good condition and signed on the underside, but I can't decipher. In magnified photos I see a thin hairline crack running about an inch from the lip on one side, minor.