Perfume Studio Calibrated Amber Glass 1oz Dropper Bottle - Pack of 8 Bottles with Graduated Glass Pipette in .25ml Increments; Plus Free Perfume Sample Vial Perfume Studio Pack of 8 Calibrated Amber Glass Dropper Bottles; Plus Free Perfume Sample Vial 7x75mm straight tip glass pipette, printed with .25, 0.5, .75 and 1.0 mL calibrations Ideal for essential oil blends - Accurate Measurements Reusable and Durable NOTE: Perfume Studio is the manufacturer and the only authorized seller of this item. Other sellers sell an inferior different product. Make sure you buy from Perfume Studio.