The size of her, uh....(spoilers)
I don't know about any of you ladies out there, but I don't think, in any circumstance, I could get the bottom end of a bottle into my lady parts. Let alone walk around with it inside. Or have it completely inside, so that when Mr. Rapist looks at my vertical smile he sees nothing protruding. There is just no way.
But, that said, the scene was absolutely spectacular.