Money Bag q's.....Ugh

Ladies, are you using a 'money bag'?

How does it work- Do I give it to someone to hold for the night? The guests who come to us with cards, do I direct them to the designated person (or accept them graciously and then pass them along)? Do I put it away at some point in the evening?

My mother purchased one for us and she's been pretty annoying over who holds on to it. (not to mention, its white.....nothing in my wedding is white)
I honestly don't even want to use it.