50ml Square Tall Glass Dropper Bottles, with new Metallic Collars, Overshell, Glass Bulb Pipette Medicine Droppers. Perfect for protecting and storing your valuable Essential Oils, Carrier Oils, Argan Oil, Beard Oil, Medicines, Serums, etc. these bottles are refillable too . These are the perfect solution to precision distribution of your products, drop by drop, and for measuring out essential oils drop by drop to combine into fabulous perfumes and blends! You'll love using these! Well Made Glass Construction.