This glass fermentation jar is perfect for fermenting sauerkraut, wine, fruit, and any other fermented vegetables or foodstuffs. It features an automatic air valve design, time recorder, and silicone double seal to extend freshness and shelf life. The safe glass material ensures the best environment for fermenting food, and all batches can be easily tracked. Available in 500ml capacity and 10.7 x 11cm size, this pot is easy to use and easy to clean. Features: 1. Automatic Air Valve Design: The gas generated during fermentation can be automatically discharged, effectively avoiding extreme situations such as tank expansion. 2. Time Recorder: There is a time recorder on the lid, to keep track of batches, No more needing to remember when that batch started. 3. Minimizes Chances of Rot: Silicone double seal, no air leakage, no water leakage, it is very hard for contaminates to grow in a vacuum, increasing your chances for success. Extend the freshness and shelf life of things 4. Safe Glass Material: The glass fermentation jar is made with healthy glass, a perfect choice for storage and fermenting food, to ensure the best environment for fermenting vegetables, no dust or chemicals leach into the food anymore. 5. Applicable: Perfect for fermenting sauerkraut, wine, fruit, and any other fermented vegetables or foodstuffs you might fancy, easy to use, and easy to clean. Specification: Material: Glass Color: Blue Capacity: 500ml, 750ml, 1000ml, 1500ml Product Size: 10.7 x 11cm, 14.2 x 11cm, 17.2 x 11cm, 22 x 11.5cm Product Weight: 550g, 650g, 800g, 900g Package Included: 1 x Fermentation Jar