She may never have any use for that bag....take it back....
Brides have a registry for a reason....it is items that they want and need...why would you want to divert to something else...
Same goes for the clock idea...maybe she wouldn't want that type clock or have no place to sit or hang it...another waste of money....
You may not like what is on her list....but its her list...
I liken this to when someone asks me for gift ideas....and then they buy me some item I have no use for...now I am stuck with it...and have to be pleasant and say thank you...ugh...