This is a very hot take but milk. I get straight bullied for it by my friends and family but atleast I have the excuse of a medical reason.
For me, milk is incredibly hydrating and satisfying to drink. Genuine pick me up in the mornings, the coldness is refreshing but I've had water at that temp and it isn't the same. Its like my head clears and suddenly I am awake. I think the reason for this is a mixture. I drank a lot of milk as a kid, especially in the mornings because water tasted gross (only in the morning), so it could partly just be nostalgic or comforting but also it satisfies my cravings. However, I chug that shit, the glass is gone in less than a second, so perhaps its the coldness mixed with how fast I am drinking it just waking me up idk.
My medical reason is that I piss all my calcium away so I am constantly craving it