Heavy-duty media bottle can be used for storage as well as mixing and sampling. Includes linerless, one-piece autoclavable polypropylene plug seal cap with drip free pouring rings. Optional red PBT caps and red ETFE pouring rings are available for dry heat sterilization (180°C). New glass bead indicates full capacity line on 100 mL through 2 L sizes. Bottles have permanent white enamel graduations and marking spots.