I have a friend who pretty much drinks nothing but tea. No water, coffee, alcohol, soft drinks etc. And he does get his 2-3 litres of fluids per day in like that.
That sounds about right for me… I have 250ml when I wake up, I’ll have 250-300ml of coffee, then I drink a 1L carafe of water while working. In the evening I’ll have a couple glasses of water and/or a large cup of herbal tea. Sometimes I’ll drink 2 carafes of water.
Im in the alps, so I have the privilege of having access to virtually free and safe to drink, but also tasty. It's the cheapest, easiest way to do something good for my health, so i do it. 2-3 litres is usually the recommendation i see and hear everywhere.
Tbh I sometimes drink close to 4 litres, i have to watch my electrolytes more than anything.