Can I bring a bottle water when we go ziplining ?

Yes

You can bring small back pack I'm sure you can bring water bottle

Hold on tight. They have rest stops

Not that I saw, only the 1 rest stop after a few ziplines in.

There is a stopping point halfway through the zip course where the staff takes everyone for a quick rest and drink of water. The staff provides water in a 5 gallon sports container. But to answer your question I believe if you have deep pockets you can bring a bottled water. Holding onto the water not be easy as some of the zips require the use of both hands, such as to climb a so called ladder and to steer/control your zip. I hope this answers your question.

Yes, but there is water on the trails at a couple stops