Secure threaded seal: glass bottles with screw caps form a tight, reliable seal that prevents leaks of volatile substances and helps maintain laboratory safety. The lightproof cap and packaging reduce exposure to lightsensitive samples. Chemically stable glass: made from inert glass that resists reactions with common reagents, preserving sample integrity and reducing the risk of contamination that could skew experimental results. Precise measurement: clear, easytoread graduations on each small glass bottle enable accurate volume measurement and repeatable dispensing for improved experimental precision. Versatile laboratory use: suitable for storing reagents, liquid samples, and medicines; ideal for routine chemical work, sample organization, and controlled storage of volatile or lightsensitive materials. Practical handling and performance: durable glass construction for repeated use, secure capping for transport or shortterm storage, and visible graduations for quick verification of contents and volume. Typical applications Reagent storage and handling: seal and store volatile or reactive reagents between uses without risk of leakage or contamination. Sample collection and analysis: collect, measure, and seal liquid samples for analytical testing, stability studies, or instrument preparation. Pharmaceutical and medical sample storage: safely contain small volumes of medicinal solutions or reference standards in a lightreducing package. What makes it stand out Tight threaded closure plus lightproof packaging for improved sample preservation. Inert glass minimizes interaction with stored chemicals, helping protect experimental data. Clear graduations support accurate, repeatable measurements in daily lab workflows. Compatible uses: chemical labs, research facilities, quality control, sample storage, and clinical or pharmaceutical settings.