I got a KOR ONE Hydration Vessel for Christmas and I’m extremely happy with it. It’s BPA-free, so it’s safe, and the spout is easily the best I’ve ever had the pleasure of putting my lips on. It also has a great design and is small enough to carry around conveniently despite its large capacity. Recently, they announced new colors, which is even cooler, and they’ll also donate money to different organizations depending on which bottle you buy.
You should so totally get one of these.