The booster fins screws onto the threads of the 2 liter pop bottle. A 4-5 inch cap should be cut off of the top of another bottle and placed on top of the launch bottle to give it a higher trajectory. A parachute can be placed under the cap and will be released as the bottle turns downward.
M**!
Boost your launches!
Awesome fun! Add these to your bottle rocket to help it launch straighter and further!
Trustpilot
1 day ago
2 days ago