This beautiful bone china coffee cup was designed by Hannah Morrow, an English designer living in LA. The bone china is super thin - almost see-through.
The cup is part of her Hedy collection, which consists of just three items: a coffee cup, a small vase, and a medium-sized bowl. Morrow herself calls the collection:
[...] a celebration of the ceramic tradition of handmade fine bone china. It brings a beauty to each piece that is deceptively simple.