These general-purpose media bottles feature permanent white, imprinted graduations and marking spots. Borosilicate glass; Linerless polypropylene cap; Drip free polypropylene ring; Screw thread opening 30mm ID; Dimensions: 64mm OD x 143mm Hgt. Graduation range: 50ml to 200ml; Autoclavable to 140°C (284°F) Maximum bottle temperature: 450°C