Have you looked at "Pickle pipes?" they resemble baby bottle nipples and replace the lid on a mason jar. They have a tiny hole and it allows for burping during the process. They come with glass weights sized for jars. No moving parts or parts to assemble.
Jocelyn, I was sittin around with not a lot to do so I went on an Amazon Mason jar idea hunt... The sleeves make them almost unbreakable - at least enough to have enough confidence to take them on the go... Cheers