The filler is purchased by the syringe and used amount depending on the area and patient’s age. For example, if you’re in your 20s, you might only need half of a vial for cheek fillers. In your 30s you might need a full vial, and if you’re in your 60s, three to four vials. Dr Botros will discuss the area you want treated and approximately how many vials you might need at your initial complimentary consult.