A large volume drinker for a cage. The three liter (101 ounces) is meant for cages with a number of pigeons or a large chicken or two. The Large Cage Drinker goes inside the cage and stands on its own, but also has a metal attachment with clip; to clip on the cage wire to hold in place. The part that sticks out where the birds drink from, is metal lined. The drinker is also handy if you need to leave for a few days and you need a larger amount of water available to the birds in a cage. CAGE DRINKER W/ STAND3 QT.