1st, to counter the plain: Yes, whiskey corks do get brittle and break sometimes, but this is in fact pretty scarce. I’ve only experienced to replace 3 or four corks in my selection over the final 20 years, and some of All those were as the glue connecting the cork https://luxurybourbonwhiskey.com/a-beginners-guide-to-bourbon-whiskey-cocktails/