Feeder Holds 23.5 Fluid Ounces of Nectar. (11.75 ounces each side).Always use the in-cluded FREE Mix & Pour Pitcher to make sure you do not overfill. Make Your Own Nectar and SAVE MONEY. The pitcher holds 11.75 oz. of nectar, the exact amount to fill the 16 ports in each side for a perfect fill. Comes Apart Easily for Deep Cleaning. Simply lift off the covers to thoroughly clean all parts. The base provides stability while filling and an additional perch for birds to rest.