autoclavable to 140C (284F) medium bottles for sale 2. Bottles have permanent white enamel graduations and marking spots. 3. Glass bead indicates full capacity line on 100 ml through 1000 ml sizes. 4. Each bottle includes a linerless, one-piece autoclavable (140C/284F) polypropylene plug seal screw cap and drip-free pouring ring. 5.