Another narration is: Messenger of Allah (SAWS) reprimanded us for drinking while standing. [Muslim]
Abu Hurairah RA reported: Messenger of Allah (SAWS) said, “None of you should drink standing; and if any one forgets, he must vomit.” [Muslim] Is it allowed to eat and drink while standing?
بسم الله الرحمن الرحيم
It is makrooh and against etiquette to eat and drink while standing. Some hadith warn even more severely against it. It is Islamic custom to eat and drink in sitting position. It is the habit of Jews and Christians to eat and drink standing.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.