Quality Materials: Made from glass, wood, cotton and linen, silicone, and paper, ensuring and repeated use. Breathable Cover: A cotton and linen cover with an elastic band allows for air circulation, essential for natural fermentation. Sealed Lid: Comes with a wooden lid that provides a tight seal, perfect for storing perishables. Large Capacity: The jar holds approximately 900ml, suitable for substantial fermentation projects. Temperature Monitoring: Includes a temperature indicator card for real-time temperature tracking inside the jar.