Featues: Refills in seconds directly from a standard perfume bottle. Perfectly transfers your fragrance without spills. Aircraft approved for carry on baggage. Note: Only fit for the nozzle diameter of the perfume bottle less than 4mm and the length is greater than 6mm. Special Tip: Travel with a small amount of perfume rather than a large very expensive bottle. Easy to fill and put away with no worries for leaking.