Absolutely New, Inc Anti-Squirrel Bird Feeder The Anti-Squirrel Bird Feeder holds 3 lbs. of birdseed and the seed reservoir unscrews for easy refilling and cleaning. It's constructed of durable, weatherproof ABS and polypropylene. Comes with an adjustable hanger for tree branches or light posts. Perch base unscrews for loading and cleaning Dual disk spinners operate under the squirrels own weight Four comfortable perches where birds can access their birdseed No batteries required