Blue Glass Bottle w/ Black Mist Sprayer and Leak-proof Cover, 2 Oz (10 Pack) High-quality thick cobalt blue glass provides excellent UV protection for your essential oil blends, fragrance oils, perfumes, remedies or any liquids that are sensitive to degradation from light. Leak proof lid and reliable wide mist sprayer mechanism. Travel-friendly size. Great for a homemade bug repellent blend, linen spray, sanitizing solution, cooling mist, perfumes, colognes, chemistry and laboratory chemicals, and as a dispenser for medicine cabinet items. Easy to clean and sterilize.