Remove the cap or lid of the bottle.
Remove the outer bottle gently from the pump.
Pour your desired skincare product into the inner bottle. It’s important to ensure that the bottle is sterile, clean, and completely dry.
Fill the bottle slowly to avoid creating bubbles that can trap air inside the bottle. Once the bottle is full, gently place it back into the outer bottle and attach the pump back on.
Pump the bottle a few times until the product comes out smoothly.