A rare example of clear glass in the shape of a libation cup and made in the style of carved rock crystal. The piece was manufactured by melting the glass in a mould, with some of the details which were incised by hand. The piece is elegantly decorated with two figures of dragons in high relief, one on top of the other. The dragon in the bottom forms a hollow cup. This artwork is characterised by an exceptional dynamism, while the detailed representation of the beasts immediately transport the admirer to a mythological world.