Mood elevator

We have these 3 mugs that don't match each other, but are all white on the inside. And during the past 4 months, unfortunately, they've become quite UN-white on the inside, possibly due to my overly frequent consumption of coffee. So much so, that it was an embarassment when friends came over this weekend, and I had this urge to pour coffee into the mugs as soon as possible, so as not give the visitors a chance to look inside. (These visitors, don't need additional reasons to jeer us - seeing as how at that point in the evening they had already made comments about how pathetic our wine rack is standing there with merely 1 bottle). In any case, I told Vadim about the "permanent" stain problem, and he agreed that we need to invest in some new cups. Except this morning, something brilliant occurred to me, and I spent about 15 minutes scrubbing the cups with this little brillo thing. And lo and behold - they are WHITE all over again. Completely, sparkling white! And I feel great.