Sippy Cup to bed?

I know you are not supposed to give your baby a bottle in bed, nor should you give them milk, formula or juice...but what about just plain old water in a sippy cup? 

We have a hard time getting Aethyn to just drink anything so I was curious if water is ok in bed?  He hasn't had a bottle since July 1st, so it would just be in a no leak sippy cup.
Any other suggestions and do you tink plain water would be ok to give him in bed?

I did this - as long is it is jus****er my pediatrician said it should be fine.  It's been many years since then (my youngest is 8!) so you might want to check with your pediatrician just to be sure.  I work in the dental field and the main worries for tooth decay are milk and other beverages - no****er.  My guess is that should be just fine.

If you can avoid it all together it would be best.  Unfortunately DH had gotten into the habit of giving Alice a sippy of diluted juice or milk before bed and now unless she falls asleep before bedtime she will NOT go to bed without something.  I know how hard this is on her teeth and not to mention potty training, but  I do worry about what it's going to do to her teeth. Unfortunately I'm at wor****il 1130pm so I can't put my foot down with her as it's DH who puts her to bed and gives in to her so that she will go to bed.  My goal is the last week of July when I'm home on vacation that we work on breaking her of this to save her teeth!  It's going to be a battle...wish us luck!