Diet lemon Coke
is putrid, but so is diet Coke. Since they switched from sugar to corn syrup in Coke Classic the quality control sucks. Sometimes it's ok but other times it's sweeter and flatter. I think it has a shorter shelf-life now. Look at the expiration dates on 2 liters, just a few months. Used to be able to open a very old Coke and it would still be OK
