Using fragrance formats
How to use a 10ml travel spray
Use a 10ml travel spray with the same attention to directions and shared-space presence as a home bottle. A portable size does not make repeated application necessary.
A HUME Fragrance buying guide

Learn the actual output
Travel atomizers vary. Record what you use rather than assuming one spray matches another device.
Refresh deliberately
Consider what remains and the next setting before adding more. Do not spray around fellow passengers or at a shared table.
Keep the contents clear
If the device is refillable, follow its guide and do not mix unidentified scents.
Try this before you buy
Choose a suitable private setting for any needed application instead of using portability as a top-up habit.