Heatstick's Wearable Hummingbird Feeder is based on a Full-Face Face Shield with a tiny hummingbird feeder built into it on the inside. If you really want to see a hummingbird up close this is the product for you. The company claims hummingbirds will feed right in front of your eyes. The feeder costs $79.95 and can be purchased here.
You might have to be very patient for this to work. However, it did work for the guy in the video below. Take a look:
