Insulated Hummingbird Feeder Keeps Nectar Cooler & Fresh Longer features a red hummingbird feeder with insulated double wall construction keeps nectar from overheating in the direct sun, shiny surface and red color attracts hummingbirds, small thin window to see nectar level, hold 30 ounces of nectar in glass jar, 4 powder coated stainless steel ports prevents rust, screw on stainless steel top with ant moat, and stainless steel hanger. Measures 4" Diameter x 10" H.