can copper be found in common household items/objects?
Copper is commonly used in plumbing, electronics (it's a good conductor), architecture, and currency, to name a few. So I guess the answer to your question is yes, copper can be easily found in household objects.
Only pennies dated 1982 and earlier are pure copper. Post 1982 are 98% zinc. Best copper source is electrical wire and busbars. Plumbing copper is not worth near as much as electrical copper. Anything made of brass or bronze has copper in it. Transformers have copper windings.
Almost everything electrical contains copper wiring. Some cookware has a copper layer on the bottom for heat conduction. -- Regards, John Popelish