OK, now that many of you have provided useful info and others have just been sarcastic as usual, I will say that just about every time I am outside of New York and drink hotel, restaurant, or any kind of tap water, I get some type of stomach ailment. I'm not asking for anybody's judgment or validation on that one. It's just my reality. "Hotel Water" was just a reference point for tap water, as opposed to the type of from-the-source water people might drink while camping.
On top of that, I am sick of opening my hotel-filled water bottle an hour into a ride to find that it's not only pissy hot, but often tastes like what I would imagine the flavor of licking a lamp post might be. I had no idea those camping purifiers add a taste of their own, but now I know and I will not use them. Simple...end of discussion.