Set of 12 multi-colored glass eye droppers for 5ml (1/6fl oz or 0.17fl oz) essential oil bottles Fits the most common 5ml oil bottles. Compatible with doTERRA, Young Living, Rocky Mountain, Plant Therapy, Plant Guru, Edens Garden and most other brands 5ml bottles Made of lead-free, cadmium-free glass. Silicone and plastic parts are BPA-free (3rd party tested) Leak-proof - mixing your oils will not create a big mess. Saves money and time by making every drop count. Quickly measure a precise number of drops of essential oils. Especially helpful with thick oils such as myrrh and vetiver. With Year of Plenty glass eye droppers you can easily turn your 5ml (aka 1/6fl oz or 0.17fl oz) essential oil bottles into eye dropper bottles. The glass eye droppers screw on tightly and are compatible with your 5ml doTERRA, Young Living, Rocky Mountain, Edens Garden, Plant Therapy, Plant Guru, etc bottles allowing you to transfer the oils precisely with no mess. Use the eye droppers to blend oils, make up roller bottles or make sample vials to give away. They assist in making lotion, soap, toothpaste, shampoo, etc. Eye droppers are especially helpful with thick oils such as myrrh and vetiver. Year of Plenty eye droppers come carefully packaged and make excellent gifts to hand out at classes. This is a Year of Plenty product - it is not affiliated with any essential oil company.