These Moonetto amber glass bottles are perfect for so many laboratory and storage applications! The 20-pack gives you plenty for organizing all your liquids, chemicals, powders, and biological samples. Each bottle has a 100ml capacity with permanent white enamel graduations from 20ml to 80ml for accurate measuring and easy labeling. Made from high-quality borosilicate glass that's thick, tough, and resistant to thermal shock - these aren't your ordinary glass bottles! The amber color provides UV protection for light-sensitive contents, and the glass has low thermal expansion coefficients with high chemical resistance for corrosive environments. The orange GL45 screw caps provide an airtight, drip-free seal that reduces evaporation and exposure risks. Both the bottles (up to 120°C) and caps (up to 140°C) are autoclavable for sterilization. Perfect for laboratory experiments, chemistry work, scientific studies, or even household storage needs. The quality construction means they'll stand up to repeated use without deteriorating. If any bottles arrive broken or shattered, the company offers refunds and is constantly improving their packaging. Whether you're a professional researcher, student, or hobbyist, these reliable glass bottles deliver the quality and functionality you need for proper sample storage and organization. The 20-pack means you'll have plenty on hand for all your projects!