water

I'm up all night regardless of how much water I've had lol.
I must have a very active bladder haha.
As long as u drink 8 glasses a day / 2 litres then that's enough x

The goal is drink enough that your urine is clear, or nearly so. It's different for everyone and varies tremendously on activity and season and even diet. The "recommendation" is 8 cups a day but has no basis in any actual science or medical literature (and has been disproved in recent studies.) So it's difficult for someone to tell you how much. Clear urine and feeling good should be what tells you YOUR answer. Me, I rarely get more than 5 cups a day (and this is counting ALL liquid, not just water) and if I wake up at night, it's never more than 1 time. If I don't have any after about 9:00 pm then I usually don't have to get up in the night. Other people drink much more.

I average 4 L of water a day in addition to soymilk, etc. I usually do not need to get up in the night but if I do it is only once so it isn't a big problem.