Fits beer bottles, newer (since December 2008) Siphonless Fermenter lids, and other 3/4" openings. Drilled for a standard airlock.
Jan 27, 2021 by Patrick
Q: What material is this stopper made from?
A: Our bungs can be recycled as they have the plastic recycling symbol #7 . This type of plastic is fully recyclable and environmentally friendly as it is BPA free.
Purity
Pros: Absolutely pure, inert, no flavour or odour -- common black lab stoppers have a terrible asphaltum odour flavour and scent.
Cons: These are slippery little critters when wet, and if yours pops out of the carboy/bottle, simply try again or switch to another size.