Flying From Changi? Pack Your Beauty Bag Before the Airport
Your mascara counts too. Packing a beauty bag for a flight is not just about moving the shampoo into a smaller bottle.

Use the container size, not what is left
For ordinary hand-carried liquids, use containers with a maximum capacity of 100ml each, packed in a transparent, resealable one-litre bag that closes completely. Changi includes perfume, creams, balms, oils, mascara, lip gloss, toothpaste and gels among liquids, aerosols and gels.
A nearly empty oversized bottle is still oversized. As a packing example, choose a labelled 50ml container over a 200ml bottle holding the same amount. Lay everything out together before deciding what fits; your skincare and toiletries share the bag.
A smaller edit beats a suitcase of minis
Pick what you need for the trip rather than filling every spare corner with samples. Keep product names readable, close lids properly and separate items that might leak. Check each product’s packaging and airline rules before decanting or packing aerosols.
Do not assume that everything unsuitable for hand luggage can automatically go into checked baggage. The liquid-volume rule and restrictions on dangerous goods are different questions.

Buying beauty after security? Keep it sealed
Changi says transit-area liquid purchases above 100ml should remain in the shop’s security tamper-evident bag with the receipt visible. If you have a connection, check that airport’s restrictions too. Ask shop staff and your airline before buying an expensive large bottle.
For travel to Australia or the US, or on United Airlines, Changi advises checking purchase eligibility; eligible purchases have a 90-minute pre-departure cutoff. Leave the final shopping sprint for something less complicated than perfume.