High-quality material – essential oils roller bottles made of corrosion-resistant glass that makes them thick, smooth and shockproof. Coloured glass protects against harmful UV rays to protect it from rapid volatilization. The entire set comes with 20 packs of 10 ml coloured glass bottles with cap, 20 stainless steel roller lids and additional 2 funnels, 2 droppers. Appearance design – the glass roller bottle body is made of thickened coloured glass, which is more robust and not easy to break. The paint prevents ultraviolet rays and effectively protects the liquid in the bottle. Easy to carry – space-saving to take with you, 10 ml size, roll-on bottle empty 10 ml, perfect for going out. The compact refillable roll-on glass bottles small can be stored in a cosmetic bag or simply put in your wallet. Empty glass roll-on bottles. Perfect for everyday use or travel. Leak-proof design – the threaded cover and the built-in ball can keep the product tight, you don't have to worry about leakage of liquids. This versatile bottle comes with screw cap, ensures a good seal and prevents leakage to protect your oils. Don't worry about your oil leaking. Makes bottles roller also easy to open and close. Wide application: essential oils roller bottles can block harmful UV rays and reduce light intensity. It can be used to release synthetic oils, essential oils, perfumes, beauty serums, massage oils, essence products and mixed oils, etc. Mini roll-on glass bottles to protect products from light damage and maintain the effectiveness of the product.