title :)
try not to drink/eat infront of them, or leave water bottles out in plain view etc. Just don't be weird about it with them, like don't act like they are dealing with a hardship during this time. Most see it as an opportunity to exercise their faith, so the challenge is welcome.
Honestly just ask your friend about it, ask what he individually wants. Would be a good opportunity to show that you care about him and his wellbeing.
yea im just speaking from my own anecdotal experience as a non-muslim with lots of muslim friends. Quite a few of my friends don't like when people eat/drink near them, but a couple didn't mind so I just don't do it out of respect for those who don't.
Thats why I said to talk to his friend as its gonna be specific to the individual, but from my experience its just easier to not do it in front of them.
I never leave a tiny pixel of food on my plate
there's a culture for indonesian muslim called bukber or buka bersama that's basically means breaking the fast together with our friends or family. but sometimes we also bring our non-muslim friends when breaking the fast as if it is just a normal dinner for them. i think you can take your friend to a dinner whenever he/she break the fast because i personally feel a lot happier if someone take me to break the fast together rather than doing it alone.