Hi I have the following four bottles in my larder, they have all been used but not for 6 years. The screw on tops are secure. Would they still be ok to drink please, i would use them for cocktails.
If none of them have ever been opened then almost indefinitely.
However, as you say they have all been used, I’d be very careful of the Amarula as they recommend it should only be kept for 6 months after opening, I guess because of the cream content. Having said that, I’ve had Amarula ages, maybe a year or two, after opening it.
Not sure about the other drinks, but it’s easily checked online.