Taylor Farms Ant Moat for Hummingbird Feeders-Hummingbird Design, Model: , Home & Outdoor Store BEAUTIFLLY DESIGNED Ant Moat for Hummingbird Feeders - Widely considered the most effective and LONG LASTING, HIGH QUALITY COPPER - Simply add 2-3 drops of vegetable oil to the cup, mix it around STOPS ANT IN COMPLETELY - The Ants can not cross the oil barrier. and it doesn't evaporate. SIMPLE AND SAFE TO USE - This ant moat for hummingbird feeders is completely safe for hummingbirds. Made in the United States! 100% Total & Complete Satisfaction, No Questions Asked, Money Back