Neatly Pack Cosmetics
"I recommend transferring the products into small containers to reduce the amount of luggage space they require," Marie suggests. Alternatively, "Bring cosmetic samples on your trip that you've been meaning to try. You can finally use them up."
And don't overlook this tip: "To be safe, put everything in a waterproof pouch to prevent leaks. The pouch can be as simple as a plastic bag with a zipper, but I recommend choosing a design that sparks joy."