I've gone off of Diet Coke, after decades of drinking it.
I got pretty good at looking at date codes on 2L bottle caps before putting them in my shopping cart. As they get close to 90 days beyond date of mfgr., the taste is off. This is for Diet, not regular.
One store (Smart & Final) would sell expired (beyond 90 day, typically 6 month old) product. I complained a few times and they dropped/lost the license to sell the syrup, for about 10 years. Last I checked they carry it again.
I got pretty good at looking at date codes on 2L bottle caps before putting them in my shopping cart. As they get close to 90 days beyond date of mfgr., the taste is off. This is for Diet, not regular.
One store (Smart & Final) would sell expired (beyond 90 day, typically 6 month old) product. I complained a few times and they dropped/lost the license to sell the syrup, for about 10 years. Last I checked they carry it again.