S-Shaped Airlocks with Grommets

S Shaped Airlocks (4) w Grommets (8) Set When fermenting all your favorite food and drink, there is one rule that stays true: you need airflow while not allowing unwanted things inside your brew or ferment. This is where the grommet and airlock come in, just set it and forget it and let the airlock do the work, facilitating a healthy ferment and happy, healthy cultures.