The companies that produce copper sink drains is Welders and USink. These two companies are the best in the world at providing quality copper sink drains.

A short piece may be supported by the surface tension of water, but a coil of copper wire would sink.

A copper sink needs less abrasive cleansers than a stainless steel sink and some that are recommended are barkeepers friend and bon ami. Both use less abrasives.

put water in the mixture, the wood will float and the copper will sink.

:D

I have a copper sink and clean it one a week with Table Salt and Vinegar. Come up like new