I’m thinking of an object that I saw when I was younger, but I don’t recall its name.
It was a rubber cylinder, filled with liquid. Its shape was sort of a cross between a cylinder and an elongated torus, such that the I.D and the O.D were indistinct, similar to a Möbius strip but cylindrical.
When you tryed to hold this object, the inside spilled out to the outside, similar to what happens with rectal prolapse, and it usually ended up falling right out of your hand.
What was it?