Hi everybody,
I've just moved to Australia, and it might be the culture difference.
I'm just wondering whether it's rude if doing the following.

filling my glass with purely milk at coffee break. Because every one else just drink some coffe at coffee break, they add only a little milk to the coffee. For me, I just don't hate coffee.

I'm not sure if it is ok if I just filled my glass with purely milk instead of coffee.

thank you for answering.
cheers