Pickl-It Original Fermentation Lid Kit Convert 'Fido' Jars For Anaerobic Pickling Our airtight-lid and airlock system are the same practical tools used by our ancient ancestors Many Pickl-It customers have switched from canning to Pickl-It fermentation, preserving their precious food Glass-Lid - Made in Italy Silicone grommet  USA-made FDA food-grade Barrel Air Lock  One-way valve releases excess CO2 and oxygen, creating natural, spontaneous anaerobic conditions