PUREGRIP® Carboys are the first ever 83B Glass Carboy on the market. This product line features the largest writing surfaces and visible graduations on a glass carboy, while including our patented VersaCap® made from Class VI, Animal Free, Polypropylene. A platinum-cured silicone O-ring ensures our leak-proof seal while the large handles with finger grips allow for easy tightening and opening. The VersaCap® technology, sold separately, is also compatible with a variety of adapter inserts, enabling users to quickly change top connections to match their application needs. This product line is autoclavable and sterilizable.