You have to keep trying else she will have difficulties when being 'introduced' in the IFC all over again. I have a friend whose child is in IFC, cannot drink milk from bottle and teachers are too 'busy' to keep trying.
Initially my lo had difficulties too, but she loves Comotomo and Tommee Tippee now. She's 12m old and is both DL and bottle fed when I'm not around :)
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