Penn Plax Glass Tube Seed or Waterer can be filled with either seed or water. This fountain style feeder makes feeding or watering easy and effortless, with a clear tube it allows you to see the seed or water levels at any time. Includes a durable clip that securely attaches to all types of wired cages holding the fountain feed in place at all times. For smaller birds like parakeets or lovebirds. Fill with seed or water Clear tube allows you to see the fill levels Great for small birds Includes attachment clip