personally, if I was a MOH, I'd never dare be so tacky as to basically tell the bride I wanted a gift and what it was. But seeing as the OP is ok with it, I'd suggest you let the MOH even pick out the bag she wants seeing as she is already so bold. Frankly though, I feel it's such a tacky idea. We all got pretty silver bracelets when I was a bridesmaid. I was also MOH at my sister's wedding and she gave me a pretty necklace to wear with my dress.