Premium Materials: Crafted from durable transparent glass and a sturdy aluminum screw cap,our sample bottles are leak-proof. Ideal for storing essential oils,ink,and various liquids,they leave no residual odors to ensure samples remain fresh over time Clear View DesignThe 40ml (1.35 oz) capacity is ideal for portable use and precise portion control. SizeH:61mm(2.40 in) × D:37mm(1.46 in)The transparent glass body allows you to easily identify the contents and monitor the liquid level at a glance,making organization and retrieval effortless Airtight SealEach cap features a reliable screw mechanism with an added sealing insert,creating an airtight closure to prevent evaporation and leakage. The wide mouth opening makes these empty bottles incredibly easy to fill,refill,and clean for repeated use Uses for DIYThis 15-pack of small glass bottles is versatile for countless applications. Use them as sample vials for perfumes,anointing oils,or as storage containers for beads,and travel-sized liquids. They are excellent for DIY crafts,labs,and home use Reliable Storage: We safeguard the integrity of your transparent screw-cap glass bottles. Each product is designed to provide a dependable,reusable storage solution for your precious liquids and samples,meeting all your storage needs.