The basic ruling is that one should drink while sitting, which is better, but one may drink while standing. The Prophet did both to demonstrate that there is a lot of room for manoeuvre in this matter.

What are the Sunnah eating habits of Prophet Muhammad? -Saying "Bismillah" before eating -Eating with the right hand using three fingers -Expressing gratitude after meals by saying "Alhamdulillah" -Avoiding criticizing food -Eating in moderation (1/3 food, 1/3 drink, 1/3 air) -Encouraging eating together for blessings -Avoiding eating while reclining -His dietary guidance, based on simplicity and gratitude, aligns with modern health principles.