Erlenmeyer Flasks, Teflon* FEP, with Screw Cap, NALGENE*
Flasks are unbreakable, nearly transparent and non-contaminating. Teflon resists virtually all chemicals. Withstand temperatures from -270°C to +205°C. Can be boiled in nitric acid for trace metals work. Can be autoclaved or chemically sterilized. With convenient Tefzel* EFTE cap. Before autoclaving, set cap on top of flask without engaging threads.