What is this called?

I think bums carry them to burn Sterno.

What used to be collectors items are now called space clutter. We like silver so we collect said items, Now's the time to chart collecting them : ))

cuppa

It's iron mug.

Officially, this symbol is called commercial at. Unofficially, most people seem to refer to it as the at sign or just at. Recently, there has also been a movement to call it the atmark.

A mug.

That's a whatcamacallit.

Looks like a cup with holes in it.

a thing

It looks like a glass holder for hot drinks like russian tea and Christmas punch and suchlike