ultravioLeaf 50 ml (1.7 fl oz) Black Ultraviolet Glass Slow Pour Bottle (1) 50 ml capacity (1.7 fl oz). Height: 4.2" | Diameter of Bottle : 1.5" | Diameter of Opening: 0.4" LABORATORY TESTED ULTRAVIOLET GLASS PROTECTS AGAINST HARMFUL LIGHT - Premium European UltraViolet Glass (UV-A) Storage Containers for essential oil blends, tinctures, and any other liquid requiring precise measurement. It prevents harmful visible light rays from penetrating and degrading your liquid concentrates, while at the same time allowing beneficial UV and infrared wavelengths of light that can kill molds, algae, and bacteria. SMELL-PROOF and AIRTIGHT- Heavy durable ultraviolet glass blocks air exchange and locks in aroma. PREMIUM QUALITY STORAGE CONTAINERS- Extend the freshness of your stored liquid concentrates for 6 months or longer. Environmentally Friendly. Contemporary Design. BPA-free Twist On Cap With Airtight Leakproof Seal. Medium Capacity Perfect for Use Around the House or On the Go. HASSLE-FREE MONEY-BACK GUARANTEE! If for any reason you are not 100% satisfied, within 30 days, please notify us and return your ultravioLeaf product(s) for a no-questions asked, full refund.