The 203CPBN-2 Glass Hummingbird Feeders by Perky-Pet are designed specifically for outdoor use, featuring a hanging mount for easy installation. Made of clear glass, these feeders have a capacity of 8 ounces and come with built-in ant moats to keep insects out. Perfect for attracting hummingbirds, these feeders are a stylish and practical addition to any yard or garden. With a brand known for quality products, these feeders are sure to bring joy to both hummingbirds and birdwatchers alike.