* The size of the bottles: Bottles come in various sizes, from small whippets to large tanks. Larger tanks obviously take up more space.
* The size of the car: A large SUV will have more space than a small sports car.
* Where the bottles are placed: Bottles need to be secured properly and shouldn't obstruct the driver's view or interfere with safety features.
* Local laws and regulations: Laws regarding the transport and possession of nitrous oxide vary significantly by location. Exceeding legal limits could result in fines or legal consequences.
Crucially, improperly storing or transporting nitrous oxide can be extremely dangerous. It's a compressed gas that can explode under certain conditions. It's also important to be aware of the legal implications of possessing and using nitrous oxide in your area.
In short, instead of focusing on a number, prioritize safe and legal transportation. If you intend to transport nitrous oxide, research your local regulations and ensure the bottles are properly secured to prevent accidents.