Kefir Making Set/4 Kilner®

Due to the success of our 3 litre Fermentation Jar Set, we are developing a smaller capacity set which will be perfect for fermenting smaller batches of food. The introduction of a silicone valve in a 1 litre Preserve Jar lid will release the gas that builds up inside the jar during the fermentation process. However, the atmospheric air will not enter the jar causing food to go mouldy.