I know that this is not part of your question but have you considered putting a sink in your coffee station? Since you are doing a major remodel of the bathroom anyway it may not be difficult or much more costly for them to put in a bar sink by the station at the same time.

When redoing your bathroom you can use any material that is used for the kitchen. I do not see why not.

Meanwhile.............When dumping your coffee try diluting it first so that strong staining coffee does not splash the sink, and being carefull to pour it directly down the drain. Use the shower drain if its bigger.

Did you know that plants like coffee? Get a big potted Philodendrum and pour it in the soil. Or just out the window! Put a window box with plants outside the window if you think the neighbors will think it is strange that you throw liquid out your window every morning. You don't want them to think you are emptying a chamber pot out the window like they did in the old days. :)

BTW save you coffee grounds for you plants. They love them in the soil. Starbucks even has a program to bag their used grounds up and package them for gardeners.

Thanks so much for the suggestions, Dilly Dally! Apparently, there's a drainage problem in adding a sink on our second floor, because we're on a solid 5' slab. (Think above-the-floodplain house without the stilts.) It's one of those "clear hind-sight" things that I should have put a sink in when we added this section onto our house. But for now, it would cost too much $$$. I'm going to look into look into an alternative to a white sink, anyway, even if I didn't have the coffee issue. I do think I'll start watering the plants with that coffee. I wonder if it would help my drooping poinsettias?!! I guess another alternative is to make less... or drink more... coffee!! Thanks again!

How about a Blanco Silgranite in Cafe Brown? They're made for kitchens, but they have smaller bar sinks and prep sinks that might work. Silgranite has a major fan club over on the kitchens board.