I've inherited a ghastly white sink which constantly stains in my new house and no room for a dishwasher. So, I use a small plastic bowl for w/u. I'm on a water meter, a new thing for me, so I'm very aware of water use. I would imagine my bowl & sink are some of the cleanest and germ free in the country. Even when I had a huge triple sink & a dishwasher at my old property, I still used a bowl. Always conservation conscious....
I can never understand why large sinks are filled to the top for w/u but, we are all different- thank God