VISUAL WINDOW - The refillable perfume bottle travel adopt a visual side window design which allowsyou to monitor the volume of perfume so that you can add perfume in timeSTRONG AND STURDY - The reusable perfume spray bottles are very sturdy and durable you dont haveto worry about our perfume bottles breaking when dropping on the floor perfect for travelingWIDELY USED - OUMOR travel perfume holder basically works with most standard perfume bottles andcosmetics with a spray head bringing you a fine spray of perfume sprayHOW TO USE：Step 1: Remove the cap of the mini cologne and press the nozzle a few times to release the air in the emptybottleStep 2: Align the bottom of the empty perfume filler travel with the straw at the top of the perfume containerStep 3: Press the travel perfume container up and down repeatedly to inject the perfume