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