The Aspirator Bottles are made of Polypropylene and are therefore much lighter than the glass. Our Aspirator Bottles are Autoclavable, Durable and Dependable. The Leak Proof Spigot screwed to the Aspirator Bottle’s body requires only a half turn to open or close. Our Aspirator Bottles are used for storing or dispensing distilled water and other laboratory solutions. Threads should be totally disengaged before autoclaving.