The round bottle is widely used in laboratories, homes, and traveling for storing or dispensing liquid such as beard oil or hair oil, essential oils, cosmetics, shampoo, conditioner, body & hand cream, lotion, or sample distribution. Specification Capacity: 1 Ounce/30ml Overall Size(inch): 78.6 x 33mm/3.1 x 1.3 Inch(H*OD) Mouth Inner Diameter: 12.3mm/0.5 Inch Mouth Outside Diameter: 19.4mm/0.8 Inch Color: Amber(Bottle Body); Black(Bottle Cap) Material: Glass(Bottle Body); Plastic(Bottle Cap) Packing List: 24Pcs x Sample Bottles Advantage 1. The sample bottles are made of durable glass material that can resist high and low temperatures, has superior chemical durability, is not easily broken and deformed, and can be used for a long time. The thickened bottom of the bottle ensures bottle stability. 2.Amber color protects light-sensitive samples from sunlight, extending their shelf life. 3. Screw cap's tight seal reduces the risk of liquid evaporation and spills, preventing leakage of your liquid during use. Instruction Twist off the cap, pour the liquid into the bottle, and close the cap. Note: Please check the size before purchasing. Use with care to avoid breakage.