Simple metal containers in the shape of a box or cylinder are common.
He straightened, and placed the two metal containers upon the table.
We were awakened by the crash of large metal containers being brought into the floor area.
A pan is a metal container usually with one long handle.
For 45 minutes, he sat in a metal container not much bigger than a garbage can.
In the back, lying on its side, was a metal container.
His head was above water, and over the top of the metal container.
From the outside, the metal container acts exactly like it simply has a charge +Q, with no charges inside.
Really nothing more than gigantic metal containers, put together in space.
But it was certainly the last word in metal containers.