Formats and concentration
What is a perfume travel atomizer
A perfume travel atomizer is a portable spray container for carrying fragrance. It may be refillable or supplied already filled; check the exact design, compatibility and contents instead of assuming every small spray works the same way.
A HUME Fragrance buying guide

Distinguish container and fragrance
An empty atomizer is an accessory, while a filled travel spray includes a product and quantity. Read the listing before comparing prices.
Follow its filling instructions
Bottom-fill, removable-top and other systems have different requirements. Do not force a perfume bottle open or assume every nozzle fits a refill device.
Plan for carrying
Keep it identified and securely closed. Check your carrier's current liquid rules when flying; portability does not establish that your whole bag complies.
Try this before you buy
Record whether the item is empty or filled, its stated capacity and its specific refill method before buying.