An amazing technique--requiring ultra-fine brushes and a steady hand--
is used to apply such color and detail onto the inner surfaces of small, narrow-necked glass bottles.
Most commonly, the art is practised on small, rounded glass containers called "snuff bottles".
The bottle shown here is a prismatic (3-sided) bottle we purchased during a trip to China in 2011.
While this bottle is 3-sided, its inner chamber is cylindrical with a diameter of approx. 2.5 cm.