If you use a canning jar with a rubber ring top, and close the lid, be sure to burp it a few times in the first few days to release the pressure.
If using the weck airlock system which has it’s own release valve allowing gasses to escape without letting air into the jar, place the rubber ring around the top and clamp down the lid with the attached release valve to the top. Store in a dark place for one to two weeks (ie pantry).