Set of eight bird drinkers, 19th century

Set of eight bird drinkers, 19th century.
Blown glass.
Two of them have marks of use and two of them are chipped.
Measurements: 15 x 14 x 7.5 cm. the largest.
Eight bird drinkers from the 19th century. Made of blown glass, three of them have a cylindrical body in the shape of ampoules with a protruding spout to hold the water. The other five, which are smaller, have a trapezoidal body in various shades of translucent green or transparent glass.