Essential oils, massage oils, or colognes can, over time, lose their potency and aroma when exposed to sunlight and air or when stored in the wrong choice of bottles. But fret not—the 20 ml Stainless Steel Roller Applicator Bottle takes good care of the most volatile of liquids. With its airtight cap, it prevents any spills, keeps out damaging oxygen, and traps in the scent of your product. Unlike plastic rollerballs, this bottle’s stainless steel roller applicator won’t melt even when it comes in contact with potent essential oils. And the real showstopper? Its ultraviolet glass. Tested in a lab, this European glass effectively blocks out visible light and lets in beneficial UVA and infrared rays to enhance the quality of your product.