Reusable : Made of silicone , it is sturdy and dishwasher safe , resistant to cracking and deformation . It can be safely used for fermenting vegetables like cucumbers , carrots , and garlic No Burping Needed : It adopts a one way waterless airlock system that automatically releases gas to avoid pressure accumulation . No manual venting or water level maintenance is required , making it ideal for users seeking zero maintenance fermentation Safe to Use : Reduce the risk of jar explosion or fermentation failure . The airtight silicone seal and auto venting valve not only isolate oxygen but also maintain pressure balance , ensuring that probiotic rich foods ferment Track Fermentation Progress : Equipped with a smart date tracker , it allows you to monitor the fermentation progress at a glance . Say goodbye to guessing and forgetting batches , specifically designed for sauerkraut , pickles , and preserved vegetables , it simplifies the entire fermentation process Suitable for Wide Mouth Glass Jars : This fermentation lid is specifically designed for standard wide mouth glass jars , featuring a leakproof sealing structure . There is no need to worry about the lid falling off or pressure buildup , making every fermentation process easy and hassle free