Pyur Scientific Glass Reagent Media Storage Bottle GL45 Screw Cap Graduated Storage bottles, made of Thick Borosilicate Glass, which is so thick that it can handle almost any Pressure and temperature, from the most harsh chemicals to extreme heating agents. It is stable and durable, great for any use, It can measure up to 250ml liquids. These are laboratory grade, but can be used for storing nearly anything. Comes with GL45 screw cap to prevent leaks. The threaded screw neck of this bottle is made to prevent spilling while pouring.