This top-fill hummingbird feeder features Perky Pet's new Push-Pull technology for effortless refilling--just push, pour, then pull-and-lock. It features an easy to fill wide mouth top and an advanced "sports bottle" like function to facilitate replenishing the nectar. The four feeding ports appear as yellow aster flowers, creating a sweet, inviting look. With fewer parts, cleaning the Aster feeder is so simple, too. The clear plastic reservoir makes it easy to monitor nectar levels in this 12-ounce hummingbird feeder.