Idea: Add thirst quenching to the saturation parameters of food. Start with berries.
Reason: Most berries are 80-90% water. I can squeeze them and get a drink, but I can't get the liquid out of them by simply eating them. It's strange to walk through a forest full of juicy berries and not be able to quench my thirst.
Implementation: Berries have a parameter indicating how much juice they produce when pressed. Take this value and add it to the berries themselves.
Or berries quench thirst by the amount of juice produced by pressing a berry, reduced by x%.
P.S. It is also a safer way than drinking water from a river or lake, which is full of germs.