Opal Bone China Mug. A bone china counterpart to the earthenware Lincoln, the Opal is a tall thin mug with a broad ranging appeal. This mug fits any promotion perfectly. 320ml capacity. Dimensions: 77mm(w) x 104mm(h) x 77mm(d). Colours: White. Print Area: Screen - 180mm(w) x 85mm(h). Production Time: 15 working days.