Comprehensive Accessories - Pack of 6 cobalt blue glass roller bottles, together with all necessary tools. Droppers, opener, and labels help you transfer and mark different essential oils. Remarkable Product Quality - The essential oil glass bottle is made of corrosion-resistant cobalt blue glass which makes it thick, smooth and anti-shock. The cobalt blue color refillable bottle protects essential oil against harmful UV rays to save it from quick volatilization. Distinctive Durable Lids - Each thick plated plastic black lid is firmly fit the screw thread bottle mouth, which can effectively prevent any liquid leakage. Stainless Steel Roll Balls - The roll balls are made of stainless steel, which is corrosion resistant and well-made. The tightness prevents any sort of leakage. With our complimentary opener, the bottle can easily be disassembled and filled. Portable & Good Purchase - 10ml per roller bottle, the capacity is suitable to contain diluted essential oils, synthesis oil or your own DIY perfume recipe for beauty salons, the convenient size makes it perfect for travelling with you. Scroll down for more info.