Can I bring water and eat it in?

You can bring it; no need to. As long as you’re not bringing something with a strong odor that usually won’t be stopped, and even if they don’t inspect things inside pretty well either.
“Can be brought with water oh, not allowed to eat”

Let me know if you need any further assistance!
Bringing freely, no one checks at all.
Can bring/do not bring, stimulating aroma/usually will not be stopped. Putting it in/will hardly check it out.
“Can be carried with water, oh, but not allowed to eat”

Let me know if you need anything else!
Don’t mind bringing it, no one will check anyway.