Classic Brands More Birds™ Big Gulp Hummingbird Feeder 40 oz. Capacity Featuring a glass bottle and built-in ant moat, this feeder is an instant classic. The large 40 oz., wide mouth bottle is easy to fill and clean.Bring more birds and more joy to your yard. Built-in ant moat to keep ants out. Wide mouth bottle is easy to fill. Base disassembles for easy cleaning. 40 oz. capacity.