The nail pens are made of plastic, safe to apply | Each empty nail oil pen is designed with a brush tip, to touch and convenient to use | for filling lip gloss, nail nutrition oil, essential oils, nail polish, eyelash growth, etc | Suitable for travel and business trip, convenient to keep it in your bags, available in anytime and anywhere | The packaging of the funnel allows the filling to reverse this pen, you can fill the liquid with a brush of nail polish or lip gloss in the tube more easily