Answer:
I can be moved. I can be rolled. But nothing will I hold. I'm red and I'm blue, and I can be other colors too. Having no head, though similar in shape. I have no eyes - yet move all over the place.
Ten men's strength, ten men's length. Ten men can't break it, yet a young boy walks off with it.
A precious fluid, thicker than water.
When liquid splashes me, none seeps through. When I am moved a lot, liquid I spew. When I am hit, color I change. And color, I come in quite a range. What I cover is very complex, and I am very easy to flex.
Many have heard it, but nobody has ever seen it. It will not speak until spoken to. What is it?
When is it bad luck to see a black cat?