Leakproof: Our Media Storage Bottles are designed with a smooth bottle mouth that perfectly fits the GL32 screw cap, ensuring a tight and secure seal. This leakproof feature prevents any liquid from spilling or leaking out of the bottle, minimizing the risk of evaporation and exposure to external elements. Easy to Read: Package includes 4 pack Media Storage Bottles with a capacity of 250ml, featuring a graduated white printed scale, providing precise measurement and accurate volume readings. The smooth surface of the bottle allows for easy cleaning and ensures clear visibility during experiments or storage. Durable Material: Made from borosilicate glass, which is excellent durability and heat-resistance. They are chemically resistant and maintain their transparency even after repeated use. The thickened bottom adds to their durability and ensures long-lasting performance. Large Marking Area: These bottles are suitable for storing media, reagents, and other liquid solutions in laboratory, experimental, or home settings. The large marking area allows for easy identification and labeling of contents, facilitating efficient organization and retrieval. Screw Cap: The screw caps of our Media Storage Bottles are made from durable polypropylene (PP). They exhibit excellent resistance to high temperatures and corrosion, with a maximum temperature tolerance of 140 degrees Celsius. The secure screw cap design ensures airtight sealing and protection of stored liquids. Type:250ml Colour:Blue Material:Glass Package Contents: 4 * Bottles with GL32 Screw Cap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.