Would like to see either more bottles of water. or another type of drink that isn't refillable, but isnt unhealthy like soda's.
Also a constant status indicator would be nice, if UI isn't whats wanted, (I personally think a basic UI would be much easier to understand) It would be good if when fully hydrated, where it normally says "Thirsty" it could say "Hydration" and be green when fully hydrated, then slowly, as you become more thirsty, 1 quarter turns orange, then the longer you wait, it becomes half orange and so on, when i becomes full orange, then the process repeats untill its read, meaning water is urgeantly needed. This will be very helpful, as you will be able to estimate how long you can go before taking another sip, and also how much water you will need for a journey. This can work with hunger and also sickness aswell