What do you get when you store an expensive essential oil in a regular bottle? A precious substance gone to waste. Oxygen and sunlight are two problems that essential oil enthusiasts often face, but luckily, we offer an easy, stylish, and travel-friendly solution: the 15 ml Glass Roller Applicator Bottle. Its airtight cap prevents leakage and airflow and seals in the freshness of your blend. Made of European-designed ultraviolet glass, it blocks out visible light, lets in beneficial rays, and enhances your product’s potency. With its glass rollerball, you can enjoy smooth fresh swipes of your blends on your skin for years to come. • AIRTIGHT, SMELL-PROOF, & LIGHT-FILTERING: World's Best Ultraviolet Glass Jar with BPA-FREE Plastic Lid • THE PERFECT SIZE AND SHAPE: A Versatile Container—Great for Herbs, Spices, and Cosmetics