The Perky-Pet®'s Square Antique Bottle Hummingbird Feeders are available in a vibrant red, cobalt blue or clear antique bottles that feature a brushed copper base. The hardened glass nectar reservoir has a unique square shape and holds 16 fl oz of nectar. Hummingbirds will flock to feed from this feeders four decorative flower feeding ports. The base easily comes apart and reassembles for easy cleaning. Image Courtesy of Woodstream.