why isnt "Bir su şişe , lütfen" eccepted?
Should "Bitane şişe su lütfen" be accepted?
Nope. First off, you would have to say "bir tane." Saying "bi tane" is slang. However, both "tane" (piece) and "şişe" are words used to count objects and you cannot have two before one noun. :)
Can we choose between "bir şişe su" and "bir su şişesi"?
Sise means bottle?
Yep
Why not şişede? Because it is a compound noun?