Originally Posted by overdbus
Is the stopper black rubber or white latex looking type ?
I think the black rubber ones would leave a taste , test
it by boiling it in distilled water and let it cool then taste
the water, you'll know for sure then.
Yellowish white. I like the idea of boiling one & will try that this weekend. I don't think the flavor is come from wort contact with the stopper but just the strong aroma being inclosed in the fermenter. Like I said, could all be in my head, but those stopper have a strong odor.