Premium Food-Grade Silicone – Crafted from high-quality, BPA-free and phthalate-free food-grade silicone, these fermentation lids are safe for direct contact with food. No plastic aftertaste, no chemical leaching—just reliable performance for all your fermenting needs.
Patented Waterless Self-Burping Design – Featuring an innovative one-way valve, these mason jar fermentation lids automatically release gas during fermentation. No water required, no manual burping, no daily maintenance. The airtight seal keeps external air and dust out while letting pressure escape naturally.
Versatile Fermentation Compatibility – Ideal for fermenting a wide variety of vegetables including cabbage, carrots, cucumbers, kimchi, radishes, tomatoes, and more. Whether you’re a beginner or a seasoned pro, these fermenter caps make it easy to create probiotic-rich foods at home.
Space-Saving & Multi-Purpose – Unlike bulky water-filled airlocks, our low-profile silicone caps take up minimal space in cabinets and drawers. Beyond fermentation, they double as drink lids—simply insert a straw through the exhaust port for a convenient Mason jar beverage lid.
Easy to Clean & Built to Last – Dishwasher safe for effortless cleanup. The durable one-piece construction eliminates small parts that trap food residue. If you have any questions upon receipt, our customer service team is ready to assist.
