5/8 dram Amber Glass Vials, Orifice Reducers, and Black Caps (Flat of 495)Buying by the flat is the most economical way to share generous samples as you build your business. 5 8 dram holds 2540 drops. Orifice reducer controls oil flow. Amber color protects oils from UV light. Ample size for travel and first aid kits. Details These small vials are perfect for travel kits, sample kits, and giveaways at meetings and trade shows. The amber color helps protect contents from damaging ultraviolet light. Made in the U. S. A.