This is a demitasse 3D printed out of porcelain. The outside has a cubic/pixelated/voxel pattern around the cup which contrasts well with the smooth, hemispheric cup.
I designed this espresso cup just to try out 3D printing with porcelain. The piece is not actually directly 3D printed, but instead a cast is 3D printed by laser sintering. It is then filled with porcelain and fired. Even though this model was molded there is no visible seam from the mold!
The best thing about designing with porcelain is that it is food safe and can be washed.
It is available here.