Color-changing sublimation mugs are made of high-quality ceramics, and the surface is sprayed with a double-layer 3A coating, which is very suitable for thermal transfer. You can use a mug press to print any pattern, text, or logo you want on it. Dimensions (HxW) are 3.18 inches x 3.78 inches for 11oz mugs. The porcelain is jet black and delicate, the cup body is bright and thick, and the bottom of the cup is non-slip.