Only if a person comes to the galley and requests to have water bottle refilled will it be done. Most flight attendants will be happy to do it for you if extra bottled water is available. I personally think the health dept. wouldn't think it real smart to be touching the top of the psgrs. bottle (that he/she has had their mouth on)and refilling it from a large bottle that is supposedly for everyone's use. That next glass poured out of the large bottle could have big staph and strep germs...cold sore juice...nasty germs of all kinds !! YUK!! Happy flying!