[Sca-cooks] Copper bowl question

[Maggie MacDonald]

I recently found a place that is selling copper bowls at $14.99 each, so I
cheerfully ordered three, intending to use them as yule gifts.

They arrived packaged nicely in brown cardboard boxes, with the cancer
warning label that is mandatory for anything icky in California.

What is the icky thing given off by copper bowls?!?!?  They are supposedly
the best thing for whipping egg whites by hand. Is there a chemical
reaction that results?

Regards,
Maggie MacD.