Is this a Hoax?
In case you don't think antibubbles exist, here is a picture of one that I took in 1974.
This is not a very good picture, but it's real. Some of the best photos I have are these that were taken by Shannon, Susan and Sydney as part of Sydney's science project. I like how bright and sunny they are. Making antibubbles is a good project for a sunny weekend afternoon.
Of course, skeptics will say that these pictures can be faked. You'll need to make your own antibubbles to see them for yourself!
If you use this page as inspiration for a science project or other great things, please send me a photo and/or a description of your results. I will post them here with credit to you. You'll be famous!