Perfume Studio 10 ml Green Glass Empty European Cap Style Dropper Bottles. Perfect for essential oil formulas. One (1) Perfume Studio Perfume Oil/Essential Oil Vial Sample. Perfume Studio® 10 ml Dropper Bottle Set - 6 Units Green Glass European Dropper Cap Style 1 Perfume Studio Body Oil Sample Vial Perfect Dropper for Essential Oils Durable Dropper Bottles Green Glass Protects Your Oils from Ultraviolet Light