When they escape and get into his kitchen, one of Newt’s baby Nifflers climbs onto a champagne bottle Newt had on his counter and ends up popping off the cork, going flying along with it.
But, why did Newt have champagne on his counter to begin with? He doesn’t seem to be the type of person who drinks it or has guests often, so champagne seems like an odd thing for him to have.
It's not proof-positive, but we do see Newt in the vicinity of some champagne at his recent book launch. It seems likely that he (or possibly Bunty, anticipating/hoping that he'd be in the mood to party!) liberated a spare bottle while he was there.
As to whether Newt drinks per se, Queenie seems to be able to rustle up a bottle of what's described as "English Butterbeer" from within Newt's kitchen cupboards. Since Queenie and Jacob have only just arrived in the country it seems unlikely that they've had time to stop at a local off-licence, strongly implying that it belongs to Newt.
