An old bottle of frangelico seeking answers

So I was gifted an old bottle of frangelico. It’s sealed, the box and all. No dates on the package. And struggling to get answers.

Is this worth anything? Like where people would get mad if I drank it. Can I actually drink it? How old is it?

Or any other random information at all about it.

Was given to me via a family friend when her husband died. Was found in the back of a cabinet in a study. So it’s been stored in the dark and relatively climate controlled.