tomato sauce stained plastic bowl

What bugs me is that I know better than this. It's hard to say what exactly possessed me to micro-heat marinara sauce in a white plastic bowl. Did I think this bowl would somehow be immune to the staining properties of the evil, but delicious, sauce? Regardless of what momentary insanity I was experiencing, I now have a lovely half white, half orange bowl to contend with. I tried filling it with soapy bleach water - but all that yielded was a sanitized orange/white bowl. A coworker suggested letting dishwashing detergent sit in it overnight. I've peeked at it, and it doesn't seem to have done a lick of good. So... what remedies exist for this - short of purchasing a new one? It's not an expensive bowl mind you, but it's just not the same with the Tang-looking interior.