I echo Dana W. below.
Also, Whole milk....is not just for the calcium. It is because the "fat" content in it is essential for brain development as well. And whole milk is recommended through 2 years old.
Ask your Pediatrician.
Yes, one day they will not want their last milk. Each child being different.
BUT.. .as an alternative... instead of giving it to them IN bed... give it to them PRIOR to bed. And make a routine about it.
Or, use "Spiffies" tooth wipes, after their milk, to clean their teeth. www.spiffies.com or you can get it at www.amazon.com
It is a tooth wipe, for kids, that has Xylitol in it, which prevents tooth decay/rot. I use it for myself too. My kids love it.
All the best,
Susan