The Heritage Blue Bird Mug. The most iconic color combination in Fine Bone China, blue on white, gets a modern twist in this unique interpretation. In this collection, the underside of the mug is decorated as beautifully. The hand applied decals are designed to have an embossed texture as if engraved for an added richness to the unique design. This mug is ideally sized for coffee or tea. Modern yet classic from the Heritage Collection by Twig New York.