A tip to make ur rocket go higher!
Add those ENO powder substance or anything that can react with water and produce high amount of gas(such as panadol soluble) into a bottle fill with 2/4 water.
Close the lid of the bottle quckly with the end connected to a high preasure tire pump.
Then start the pump.
Ur bottle rocket can go up to 6 stories up if ur module really works

Good luck!