We had the opposite happen at my work a little while ago lol. New person came in and saw that I carry a 1.9l water bottle everywhere with me and they started laughing asking why when there’s water and cups in the kitchen. Cue a week of various coworkers having to prove to this person that basically everyone in the office has a water bottle of their own that they regularly use at work. Still didn’t understand at the end and they also didn’t last long, oh well.