Hammered copper sinks are one of the cheapest ways to drastically improve bathroom look. The bathroom sinks are handmade for the most part in Mexico as oval and round. Any copper sink can be used as drop-in or undermount providing it has a flat edge. Bathroom sinks with a round lip can be used as drop in only where cabinet counter is placed on the top of them. Copper can be finished with various colors or hand polished. Hammered copper bathroom sinks are produced in two sizes, small and large. All of them have standard for bath wash basin drain size which is 1 1/2 inch. As an option the buyer can request installing on the sink a drain back system. It is a pipe connecting both drains preventing water flooding a bathroom floor.