1 . Break the neck of the vial using the small file included in the box. 2 . Insert the measuring funnel halfway down the vial. 3 . Turn the vial upside down and press the measuring funnel: the fluid will drip into the palm of your hand. 4 . Apply the product to perfectly cleansed face and neck and pat gently. Then continue with make-up. Each vial contains the dose necessary for one application. The box contains a measuring funnel and two files for opening the vials. After use, rinse the measuring funnel and keep it for the next application.