Canning Jar Airlock lid

Large mouth canning jar lid for lacto-fermentation (vapor lock). I really liked thecharacterg's version although I didn't want to take up jar space so I mimicked his design a bit.

Update (2/20):
Alright fellow hobbyists! Well I now have most of the kinks worked out and it is up and running (or sitting). All corrections have been made although I did not get a fill level on it. A rubber band works fine as a seal as well.