Travelling with fragrance
How to travel with a 100ml perfume bottle
A bottle labelled 100ml needs careful checks against the current rules for the whole route. Do not assume that being at a commonly stated cabin-container threshold guarantees acceptance under every other requirement.
A HUME Fragrance buying guide

Check capacity rather than leftovers
A larger container does not become a smaller-capacity bottle merely because some perfume has been used.
Read all applicable requirements
Review airline restrictions and departure or transfer security guidance, including liquid presentation.
Consider whether it is needed
A smaller known appropriate format may be more practical, but avoid forcing a non-refillable bottle open to create one.
Try this before you buy
Verify the actual container capacity and full-route requirements before deciding to carry a large bottle.