What's the proper time to ween a toddler off of using a bottle?

My sister has an 18 month old daughter and was wondering when she should decide to get rid of it. My niece eats regular food and pretty much everything you give her but she still needs a bottle to sleep, she will only drink out of a bottle - not a sippy cup. Are there any bad effects from not taking a bottle away at a certain age? I think it's about time. Also not she has never used a binky and has never been interested in one.
By wiLLfaRRell 10 years ago :: Parenting
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