Molded silicone component line consist of stoppers and sealing systems for carboys and vessels, bottles and storage containers. Components are made from Class VI platinum-cured silicone elastomer and are manufactured in-house in a controlled environment. They can be autoclaved, sterilized and reused, provide smooth, gap-free surfaces for a true seal, and resist chemical interaction. Stoppers are available with cored holes for tubing or vents, and vessel sealing systems are available with or without silicone tubing inserts. Components are biologically safe and work with receptacles of glass, metal or plastic.