This tube of gluey muck would make a big bubble, or balloon -- it was kind of something in-between -- that you could bat around for a few minutes to a couple hours (rarely. If you got lucky), until it wore out. In 1988, I was wandering around my apartment complex with my Christmas camera and there was kid playing with the stuff. It still existed! It's undoubtedly a medically or environmentally hazardous thing of the past now, but this kid was making some great bubbles. This one was a good 18 inches in diameter!
I keep looking at this picture, wondering: where's the seam? SuperBubbles always had a seam or at least a pinch-off point and I don't see one on this. So I could be wrong. It could have been a soap bubble. A pretty impressive one, and I still love this picture!