About this item Multi-funtion: The convenient storage container can also put the liquid in the gravity settling cup of the airflow.Capacity: This empty airbrushes feature with a large capacity of 30ml, it allows you to refill at one time without repeated refills.Unique Design: There is a small ball inside, which can be used for a long time. When you use it again, stir the paint to make it even.With Scale Design: The bottle body has a scale for more convenient and accurate paint refill.This empty bottles are made of high‑quality PP material, it is durable and not easily damaged.