The Living World Combo Waterer and Feeder is a great way to keep food or water in your birds cage. The feeder has a plastic adapter clip that fits most cages and the feeder holds 4 ounces of food. Using the Living World Combo Waterer and Feeder is a safe and hygienic way to keep your bird fed and healthy. The feeder is made of durable plastic, making the cleaning and refilling process very simple.