Bottle Body Material: GlassCapacity:8mlColor: Gold,SilverLeak proof design,good sealing performance,corrosion-resistant glass bottle, practical and durable steel ball.Cool smooth rolling Metal balls for even oil application,no more rollers getting stuck or falling out.Small volume, Compact,light weight,Perfect for travel, easy to carry, refillable, secure and convenient.Perfect for loading various oil, like compound essential oils, vegetable oils,essence, perfume, massage oils etc.Package Includes:4 x Roller Bottles