#2 Stopper with through hole


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This stopper is to be used with the air-lock, then installed on the mason jar lid.



The #2 stopper was chosen for this design because it is easily purchased online or from your local home brewing store. I have used a natural rubber stopper for my product; however there is a similar silicone product. I continue to debate the qualities of each material. I like the idea of using natural rubber in a product that is close to my food; yet, it will degrade quicker than the silicone stopper.


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