as a souvenir or small gift made of clay fill it with water and blow in tones vary depending on the filling level Filled with water, it chirps happily when you blow in. The tones vary depending on the fill level. The air blown into it makes the water bubble, creating several tones at once - almost like the twittering of real birds. Great for birthdays! Dimensions: 7 x 3,5 x 5,5 cm.