The Perky-Pet Hummingbird Oasis Feeder features six feeding ports, an ant moat and holds 16 ounces of nectar. Easily attaches to wall, window or post. The design is extremely efficient with its flying saucer-like shape that provides ample room for birds to feed. Don't fool yourself, the Oasis actually will be there for the birds as they travel across the barren desert that is your neighborhood, in search of food, ultimately landing at your house!