Hummingbird Feeder Tubes &ndash; Stoppers | Make Your Own Feeders | Tube Made of Glass | Arts & Crafts | Replacement Parts &ndash; By Best Home Products (6) Decorative nectar glass tube with flower cap for the bird's delight. Tube is hand-blown. Better than Acrylic Tubes. Great replacement stopper for those hummingbird feeders you love but the tube broke. Fits most wine bottles and other type bottles that have an opening less than 7/8" for a cool homemade hummingbird feeder. Black rubber stoppers is tapered for a tight fit Arts & Crafts: terrific and easy project for school projects, church groups, scout groups and more.