Set of nine bird drinkers, 19th century

Set of nine bird drinkers, 19th century.
Blown glass.
They show marks of use, and one of them is chipped at the mouth.
Measurements: 16 x 11 x 6 cm. the largest.
Nine bird drinkers from the 19th century. Made of blown glass, some of them transparent and others in translucent greenish or amber tones, they have a variety of designs: some follow the model of a cylindrical bottle with a protruding spout for holding the water. Others, the smaller ones, have the same trapezoidal body design but are varied in their shades.