Bird feeder Material: polypropylene. Color: white. Dimensions: diameter of the feeder: 7 cm, height: 15 cm. < br /> Capacity: 450 ml Weight: 300 g. It can not only be used as a bird feeder, but also as a bird food. The situations in which you will need the nest box bottle: If you want to feed the birds automatically. Contents: 1 bird feeder.