This 20oz bottle is what I use. Ignore the label because that's not what's in there. It's filtered tap water. I happen to really like this style of bottle and lid. Would I rather that it had cute kittens or whatever? Sure. But it's clear, so I know how much is in there. It has survived many rounds in my dishwasher. If it falls over, not much spills out. And it's very easy to open and close. Plus, it's easy to grip, which is nice on hot days when my breathing has gotten bad and thus I can't really feel my hands.
Just sharing what I use. I suggest watching the video attached.