Okay, so back in 1982 my friend Jeremy ( Jez ) and I, bought these strange things from a really cheap shop in town, and I've never come across one since.
Now I'm fairly sure that they're not that rare, despite the fact that I haven't seen one since, and I'm hoping that somebody on here can tell me what they are called. Then I can hopefully buy another one.
It was made of rubber and full of water, and it was kind of sausage shaped. But it kind of infinitely folded-in on itself, so that when you held it vertically, perpendicular to the floor, it would constantly fall through your grip, due to a combination of its water weight and constantly folding-in on itself.
It would be great if I could buy a few to just fiddle around with. I learned that I will need more than one, as a bus driver dropped my old one and it sprung a leak! That was the end of that. They aren't particularly robust.
Anyway, I would be grateful if anyone knows what they are called.
Thanks.