I work at a small catholic school and can tell you why we don't allow water also. The kids can't handle it. You might think your child can but most can't. I teach 5th grade and they throw their water bottles, play with them during teaching time, eat them, anything you can think of. If I was his teacher and knew about CF I would just let him keep one, but maybe she is just trying to save her butt. Some schools can be strict and maybe she doesn't want to get in trouble with the principal.
Also, in terms of pill taking it is really an insurance issue. If something were to happen to the child (choking on a pill) then the school is liable.
Also, in terms of pill taking it is really an insurance issue. If something were to happen to the child (choking on a pill) then the school is liable.