Details: √Convenient to use The Black color of the bottle is perfect for keeping your gel polish from hardening due to the sunlight; Each bottle has a mixing ball to prevent precipitation and it can work great when mixing new colors; You can easily move nail polish or other liquid to the bottle with the funnels; the screw cap is well sealed to prevent your nail polish from leaking. √Easy to carry Because of their size, you can load various colors and carry them at a time to match your different dress styles. Good for travel, business trip or daily usage. √Wide Application Prefect for storing gel polish, gel topcoat, nail polish, homemade cuticle oil, glue for nail designs, other beauty treatments and so on.Usage： 1.Clean them by water (NOT Boiling Water) or disinfect them by medical alcohol of 75% concentration. 2.Use a funnel for filling. The trick is to not overfill the container, leaving plenty of room for the brush. 3.Put the mixing balls in the bottle. 4.Tighten the bottle cap.Specification: Capacity:10ML Material: Gloss & Plastic Size of empty bottle: 69x31mm/2.71x1.22in(LxDia) Size of funnel: 40x35x4mm/1.57x1.38x0.16in(LxMax.ODxMin.OD) Weight:700g Package includes: 20 x Empty Nail Polish Glass Bottles 20 x Mixing Balls 2 x FunnelsNOTE: You can disinfect them by medical alcohol of 75% concentration before using (Don't use boiling water). * If you are not happy with any product for any reason by GTHER, please do not hesitate to contact us. * In every customer relationship, GTHER strives to be a trusted partner and seek to achieve 100% in customer satisfaction.