Well yeah, I want my PSP but I think it is silly to have to apoligize to someone for throwing away a little cup.
Well, I guess it is silly, unless the cup was sentimentally given to you by your grandmother, in which case, it was rude to throw away something she wished for you to keep. Especially if she brought it for you/your family.
But either way, a main part of being responsible and respectable is having the ability to compromise. Just say sorry, bury your feelings for the mean time, so you don't upset anyone else, and just recieve your PSP.
It's much better than dragging out a silly argument over a cup.