Black Clay Tobikanna Dual-Handled Soup Cup — Kiln-Fired Japanese Pottery by SeitoenThe iron rich glaze on this soup cup darkens in the kiln and pools at the foot, leaving a surface that reads differently depending on how the light falls. The depth comes from the firing, not from any added decoration. Seitoen forms and firing each soup cup by hand in Japan, working at a pace that allows every piece to be made individually. The result is a soup cup that carries the marks of its making never perfectly uniform, always consistent in