From the Zubbles website: http://www.zubbles.com/index.asp

“Bubbles have long been a source of delight and fascination for children the world over.

Now, after ten years of experiments and discoveries, we have done what scientists claimed was impossible… we’ve combined the simple joy of bubbles with the beauty and magic of color, inventing the world’s first real colored bubbles.

We call them Zubbles®.”