Those tea trays are fully handmade by the studio Dilu (check here to learn about Dilu).
Both trays feature patches attached for decoration only not for preventing leakage. So it will not affect on normal using . The surface is uneven with minor sands spreading over all the tray.
There are two styles available in stock. Both tea trays have some depth allowing to shower the teapot. As those tea trays are not glaze appearing rough and delicate texture, we advise not washing them with a brush or other hard cleaning tools.