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updated bung section with recommendation for one way ventillation silicone bungs
===Bungs===
One way ventillation silicone bungs are generally recommended for long aging sour beers in barrels (after primary fermentation) <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/1528175943877281/ Question on MTF regarding what type of bung/airlock. 12/24/2016.]</ref>.
'''Manufacturers'''
* [http://www.alasco.com/bungs.htm Alasco Rubber & Plastics Corp.]