The essential nectar feeder accessory! This sweet little Ant Moat offers protection for your oriole, hummingbird and butterfly feeders. When filled with water, this little cup forms a barrier that keeps ants away from the irresistible nectar of these feeders. It has a Â_ cup capacity that offers days of protection. Constructed of striking orange UV stabilized polycarbonate, the ant moat is durable and long lasting. It is a reliable first line of defense against ants.