ANSWER:

It is recommended to sit. 

The Prophet, salla Allahu alaihi wa sallam, was seen drinking zam zam water standing.

Kindly refer to the following link(s):

Hope ur in ur best health and happiness, sheikh can u please tell us what is the best position of drinking water according to sunnah

Halal/Haram Matters | February 11, 2018 5:33 pm
Previous

i am going to have a baby . I thought of keeping his name uzair as it is the name of one of our prophets . But i have heard from my colleagues that it is the name of jews god . I want to ask what is truth ? Can i name my baby uzair ?
Next

I read on IslamQA that it is not permitted to buy gold and silver online because gold must be paid for and received in the same sitting according to Hadith. Does this mean that if I pay the seller online and he delivers gold or silver to my house in a few days, such a transaction is Haram?