Ferment mixed veggies, sauerkraut, kimchi, fruits or any other vegetable in your kitchen! This is how it goes: GLASS WEIGHT Custom made thick glass weight to hold down the ferment. PRESSING SPRING Made of stainless steel to push down the ferment with more force. ONE WAY VALVE Silicone valve releases the gas and prevents the air to come inside. STACKABLE Make more room in the pantry by stacking the jars on top of each other. FERMENTATION CLOCK Track the starting day of your fermentation for best results. PUMP Pump out the excess air in the jar for optimal fermentation conditions. FILTER Active carbon neutralises unpleasant odours. GLASS JAR The concave form of the glass jar provides for comfortable handling. Jar capacity is 848 ml (28 oz) or 1400 ml (47 oz). BOOK OF RECIPES Fermentation guide and 25+ recipes from top fermentationists. Enjoy!