This lid is made of phenolic, an industrial grade, highly rigid, plastic with a good resistance to solvents and high temperatures. Excellent for use on our amber glass boston bottles as they are highly resistant to essential oils. The cone lined cap provides a wedge type seal that not only seals across the top of the container, it also seals across the inside diameter. This liner is stress crack resistant and offers superior torque retention and excellent sealing characteristics.
4 sizes available. Please ensure that you are matching the correct size cap to your bottle!