I saw it, thought "hmm..." and didn't get around to in until months later.
Take a "pet" bottle (cheaper, weaker plastic works best) and cut off the end.
Cut a a piece of an old towel to cover the newly opened end.
Dip the towel end into water and then dip it into dish soap.
These bubbles can grow long, like a snake and at pretty strong so they are fun to touch and play with. While this is a great activity for outdoors we enjoy doing it in the bath on a rainy day.
I don't have any pictures of us playing with these bubbles because I'm too busy playing to take pictures! I'll try to remember to take some next time!