Perky-Pet 64 fl oz Clear Hummingbird Nectar Concentrate makes clear nectar that hummingbirds will feast on at your feeders. Formulated with 100% sucrose, this colorless nectar is an optimum source of energy for the little backyard visitors. This bottle can make up to 256 fl oz of clear nectar. Perky-Pet is the leading supplier of wild bird feeders and accessories. Perky-Pet wild bird feeders entice birds by providing an inviting opportunity to visit your yard. In turn, you get hours of joy as birds flock to your feeder.