Park Jong Il, really makes intuitive teaware! Here he's using his unique tea basin to wash a set of cups. I have a set JUST like this (my cups are a bit different though. Park Jong Il is one of, if not my favorite Korean teaware potter! Teas Ware, Teas Time, Teas Basin, Things Teas, Teas Culture, Korean Teas, Unique Teas, Cranes Teas
Gaiwan and Cup Set (40 ml), stony textured pocelain w/ celadon glaze. $30.00, via Etsy.