Features: 1. Refillable perfume spray bottles has pump-to-fill technology for spill-free refilling in seconds No need for any filling tools. 2. With clear visual window. Can monitor perfume volume changes at any time. 3. Different Colorful Metallic Cases are good for organizing your different perfumes. 4. 5ml Perfume Spray Bottles. Handy size and light weight. Easy to carry. 5. New Leak-proof design, strong and durable, glass free & air travel approved for luggage, purse and pocket. Product Capacity: 5ml Size: 5ml: 80mm*16.5mm; Material: Plastic and Aluminum How to use perfume atomizers: 1) before filling perfume, take off the atomizers lids, spray a few times to discharge the gas into the perfume atomizer, 2) Take off the lid of the big perfume bottle, and check the tube size of the big perfume bottle. Tube diameter 3.2mm, tube length 7mm, 3) Insert the atomizer vertically onto the perfume bottle tube, press up and down repeatedly until it refills becomes, 4) Monitor the clear visual window to ensure the best water line does not exceed the highest point of the window, 5) Filling finish, try to spray 1-2 times to speed up filling port closing. 6) After use, close the lid and take it with you, could be put in your pocket or purse, suitable for travel.