rubber

So since the rubber ball takes up more space, it has a higher buoyancy force.

The rubber ball sinks because the force from gravity on the thick rubber skin and the air inside is bigger than the buoyancy force.

It’s a constriction, just like a kink in a rubber hose, which means it can cause a serious reduction in the flow rate.

I hadn't showered that day, and I fight crime in a rubber suit.

There are also cofferdams built of steel frames with a membrane and even water-filled rubber bags.