About this objectWhite earthenware mug with an oval handle. It has been painted with stripes of coloured glazes to test how they look . Each colour is hand numbered in black glaze. "C.COL 1" is mustard yellow, "C. COL 2" is cobalt blue, "C. COL 4" is sky blue, "C. COL 3" is pale green. They are numbered out of order. There is no maker's mark on the bottom. It is covered overall in a clear glaze.