K.I.
If you are seriously considering getting rid of it, what *I* would do is bake her a really nice cake and then drop it off in the carrier to her...and then just don't ask for it back? Most times we tend to buy people gifts that *we* think are really neat...so maybe she would like it for herself?
If she gets it back to you, then I say donate it...you have used it and she has seen you use it, so the guilt (if you would have any) of getting rid of it should be erased.