ALSO, you get to drink out of a mason jar, which is always better than drinking out of cups or water bottles.
I will gently push back at @bomberqueen17 though in noting that often, these issues apply to people who don't have easy or reliable access to a water source . . .which is why they have water-bottles.
If you move around a lot during your day, you're not guaranteed to have access to a tap or a fountain at the moment that you get thirsty: waterbottle! If your job allows for water bottles but either penalizes leaving your station or is just flat out unlikely to have a moment for you to leave where you're working: waterbottle! If your situation literally forbids open-topped drink receptacles but will allow waterbottles . . .
You get my drift. And that's without actually getting into mobility situations that may make just getting a cup of water/etc non-viable. Or the fact that some of us are just so damn clumsy that an open-topped cup left around is GOING to get spilled, whereas we can more or less train ourselves to close a waterbottle.
Also I'm pretty sure that the person directly prior was going to the furthest possible imagining to make a point; mostly the people I see objecting to this kind of thing with "but then I'd be a horrible person because plastic!" are people like, for instance, my sister, with whom I had this conversation over disposable gloves for the days when her sensory shit about touching dirty dishes becomes Untenable but she still, you know, needs to use the kitchen, and when I'm not there.
This happens maybe once every couple months. But that still felt like "so much" wasted disposable stuff to her until I walked her through it.
Now on the other hand it also would not actually be unreasonable if we literally had to go thru a pair of gloves or two a round of dishes because fuck you it's a needed aid. Which is the point I think that poster was making: EVEN IF this was your use case, for whatever depressive or anxious or mobility or other disability reason, DO THAT and meet your needs of non-poisonous hydration.
But also if you are framing "so many water bottles!!!!" as "in order to keep water with me all the way through my day, I'd need at least two bottles in my bag", also: fine. That's fine.
Yes! There are other options! If you're at a place where sinks or water fountains abound, cups are a great option. Kids sippy-cups come in cool patterns if you're afraid you'll knock it over, and are all able to be dishwashered. Those mason-jar lids are EXCELLENT and likewise.
But also if you just need to buy several flats of water and put some water-bottles in your bag, just do that. Disability is a thing.