I opened up a 750 of French beer last night, and the inside of the cap had a plastic liner that kind of stuck into the bottle... Anyone see anything like this for homebrewer? Looks like it would seal really nicely.Uploading...
Fascinating Jim... Now if I could find star trek emoji's! I'll bet that creates a great seal... Try looking around the Internet yet to find this? Sneezles61
Looks like a cap that would keep a good seal for beers to be aged.
Those are standard champagne caps used during aging and conditioning, removed before disgorging. The plastic liner is called a bidule. I've had a couple hill farmstead bottles that used these. And they do seal and keep out oxygen really well.