Perfume Studio 4 oz Smalt Cobalt Blue Glass Spray Bottle/Perfume Studio Essential Oil Vial. (Set of 4 Cobalt Sprayer Bottles/Essential Oil Sample). Use for Essential DIY Oils, Fragrances, Room Sprays, Cleaning Solutions, Hair Spray and More (Screw-in Changeable Tops) (4) Perfume Studio Premium Quality Blue Boston Round Cobalt Glass Bottles and (1) Perfume Studio Essential/Perfume Oil Vial You Get a Set of Four Pieces ~ 4 Fluid Oz. Bottles with White Sprayers, Size: 1.8" width by 4.55" height. and a Perfume Studio Essential/Perfume Oil Vial Sample 4 oz cobalt blue glass spray bottle. Great for thin liquid applications, essential oil blends and formulas Durable and Reusable Cobalt Spray Bottles INTERCHANGEABLE/DIFFERENT TOPS AVAILABLE