This sweet little Ant Moat offers protection for your hummingbird feeders. When filled with water, this little cup forms a barrier that keeps ants away from the irresistible nectar of the hummingbird feeders. It has a Â¾ cup capacity that offers days of protection. Constructed of striking ruby red UV stabilized polycarbonate, the ant moat is durable and long lasting. It is a reliable first line of defense against ants.