A few years ago (before covid) I just started bringing my water bottle with me everywhere.I saw a waitress refill a tea glass while resting the side of the pitcher on the rim of the glass. I talked to the manager at that location and asked if that was SOP. He said yes. I told him we were done eating there. Then I reported that location to their corporate people. We shall see what their response is.
I will be either bringing my own iced tea to restaurants or only ordering bottled water until this gets better.
I think it was in an effort to drink more water and because I don't like disposable straws.
You should do what makes you comfortable, but I'd hate to give up good food.