Bottled water or canned drinks only. ...Assuming we ever get to fly again.
Study Shows Airplane Water Is Dirtier Than You Think | Condé Nast Traveler
https://www.cntraveler.com/story/study-shows-airplane-water-is-dirtier-than-you-think
"Flight attendants will not drink hot water on the plane. They will not drink plain coffee, and they will not drink plain tea."
https://www.businessinsider.com/airplane-tap-water-tainted-epa-faa-fda-flight-attendants-avoid-study-video-2017-2
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Better background stats
Why You Probably Shouldn't Order Coffee During Airplane Travel | Reader's Digest
https://www.rd.com/article/coffee-on-airplane/