Designed to minimize air exchange between the external and internal environment on the Big Mouth Bubbler. Constructed of durable polyethylene foam, these semi-rigid seals are resistant to bacteria, mold, chemicals and solvents. Includes five lid gaskets.
Note: These gaskets are designed for the original screw-on lid for the Glass Big Mouth Bubbler® only. They will not fit the plastic models and are not designed for use with the new Universal Lid.