I bought a little mokko shaped one of these recently too. Lovely celadon glaze. Like you I'm not sure what I'm going to put in it though.Not my photo, but I just got one of these Eimei pots the other day. It is now my favorite pot.
I have no idea what to put in it yet. Dimensions are 5.5" x 4.5" x 1.5"
I like Eimei so much, I've been thinking about getting another in a different shape, but I might be moving to fast!