This Ant Moat offers simple 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 3/4 cup capacity that offers days of protection. Constructed of ruby red UV stabilized polycarbonate, the ant moat is durable and long lasting. It is a reliable first line of defense against ants and extremely easy to use. Simply attach the Ant Moat in between you bird feeder and shepherd's hook.