Happy Hour Margarita Hummingbird Feeder. So cute! You gotta have one of these! Newly-designed feeding ports - guarantees hummingbirds. Screw-on caps. Hang or mount. These unique hummingbird feeders turn any backyard or deck into a party! They work like any other hummingbird feeder - simply unscrew the cap and fill the reservoir with nectar or a sugar solution, hang or deck mount and watch the party begin.