What happens to shipping containers that fall overboard?

While most of the shipping in the world happens via sea, what happens when the massive containers fall overboard? Where do ...
komonews

Containers floating in Duwamish River after falling off cargo ship

SEATTLE -- Two full-size empty containers are floating in the Duwamish River after falling off a cargo ship Friday, according to the Coast Guard. They were knocked into the water during the unloading ...
Charlotte Observer

Container with 3 tons of sulfuric acid is floating somewhere off Outer Banks

Up to 73 cargo containers fell off a ship Sunday off the Outer Banks and one contains nearly 6,000 pounds of sulfuric acid. Andy Wong AP Somewhere off the Outer Banks, a shipping container filled with ...