Toiletries and travel-size cosmetics packed in a bag for travel

Generally yes, provided it was bought after your last security check and remains sealed in the tamper-evident bag with the receipt visible inside, but a connecting flight through a different airport, particularly one with different security rules, can still cause it to be confiscated if that bag gets opened or the transfer process differs.

Where this commonly goes wrong

The standard rule allows liquids over 100ml through security if bought airside and sealed in an official security bag with proof of purchase, specifically because they’ve already passed through security screening once. The complication comes when a connecting flight requires you to go through security again, particularly at a non-EU or differently regulated airport, since some countries don’t recognise another country’s duty-free sealed bags the same way, and the bag can be opened or the item confiscated if staff aren’t satisfied it meets their local rules.

This is exactly the scenario covered in our related answer on what happens to duty-free perfume through another security check. The safest approach for any layover involving a security recheck is to pack duty-free liquids in checked luggage if you have the option, or check the specific transfer airport’s policy before you fly. Our travelling with perfume guide covers this in full, and the complete guide to perfume has more on caring for fragrance while travelling.