Don't be nice, be honest. I can take some critique.
I actually used to do the no plastic thing until COVID, since then I've been paranoid about sharing the same public water thing as people who aren't careful. I'm not saying that's a good reason, the risks are certainly much lower than breathing in infected air, and probably pretty low in general.
I'm also aware that the whole personal responsibility thing is pretty neoliberal. I think there are limits to that argument, like I'm a vegan, mask wearing, public transit taking human.
Edit: I have a cup of coffee in the morning and another bottle of water at lunch.
How much water do you drink in a day? I have a pretty normal size reusable water bottle and it holds more than enough for a workday. You could just fill it at home in the morning instead of needing to use the water fountain that other people are using.
I have one cup of coffee in the morning and one bottle of water for lunch. I'm perfectly capable of carrying water with me, but Jesus water is the heaviest thing people have on them. I'm just whinging, though. I'm able to manage.