Travelling with fragrance
How to travel with a 50ml perfume bottle
For a 50ml bottle, plan protection and current baggage checks rather than assuming remaining liquid alone decides eligibility. A familiar home favorite can travel only when its actual container and route requirements fit.
A HUME Fragrance buying guide

Use stated capacity
Read the container specification and keep it identifiable. Do not guess from how full it looks.
Protect against pressure
Pack so nearby items do not press the spray head or damage the bottle. Follow closure guidance.
Choose travel storage
Avoid prolonged heat after the journey and do not spray around passengers or in shared transport.
Try this before you buy
Check the bottle's stated capacity and protected packing position before reviewing the airline's current rules.