When traveling on Cathay Pacific flights, liquid, gel, and aerosol containers packed in your hand luggage must comply with standard international aviation security regulations, restricting individual containers to a maximum capacity of 100 milliliters or three point four ounces. All such containers must fit comfortably inside a single, transparent, re-sealable plastic bag with a maximum capacity of one liter. Items exceeding the 100ml threshold, even if only partially filled, are prohibited through security checkpoints and must be placed inside checked luggage prior to departure.