Globe Glass Erlenmeyer Flask manufactured by Globe Scientific is available with narrow mouth, wide mouth and screw cap options. Wide mouth conical flasks allow easy access to contents, while screw cap conical flasks include a GL45 cap with a PTFE liner for a leak resistant closure. Erlenmeyer Flasks with PTFE lined GL 45 polyethylene (PE) screw cap feature single metric scale graduations and large white marking area.