Hahah - I don't think it's about hardening up, I think it's just about being ready - you AND him. I was ready to give up the bottles, I fell pregnant when DD was 6 months old and she rejected the breast so I was expressing full time for 4 months until I stopped at 10 months. DH is SAHD too so she's been having bottles since week 2 and we were totally over the whole bottle washing, making up formula stuff. We were also a bit selfish, we really wanted her off bottles by the time bub #2 arrives, I don't think we could handle 2 kids with bottles at the same time!! LOL But that said, if she'd hated the sippy cup, I would have gone running straight back to the bottle.

I think because it's been 6 months without the boob, she was ready if that makes sense?? The bottles were frustrating her because they were slower than when she drinks water out of the straw cup and often she'd chuck the bottle away in frustration. Such a little miss that she is.....not sure where she gets that from!!!