I think the only liquids you could consume that wouldn’t hydrate you are alcoholic. The dieruetic effect of caffiene is very minor and also specific to already needing to eliminate waste, and the sugar content of soda and juice isn’t high enough to cause dehydration. And even with the alcohol, it might be fine with a low percentage beverage, like beer or wine.
Yes it does. The diuretic effects of caffeine are overrated.
I think the only liquids you could consume that wouldn’t hydrate you are alcoholic. The dieruetic effect of caffiene is very minor and also specific to already needing to eliminate waste, and the sugar content of soda and juice isn’t high enough to cause dehydration. And even with the alcohol, it might be fine with a low percentage beverage, like beer or wine.