Hi cnd,

I've never heard of that tradition, but that means little because I live in Australia. My take on it is that I think your assessment is likely to be correct. I suspect it is a social media thing which has taken off but which has no roots in real tradition. I agree that a TV show, one of those loosely described as "reality TV" could be to blame.

When I did a quick internet search using the search term "bury a bottle for a wedding" one of the quick suggestion terms on the search page was "bury a bottle of whiskey for a wedding" but the others mentioned bourbon, and even when I clicked on the whiskey line it showed bourbon related results and all of the pages were very recent.

I'll be interested in any information which sheds light on this mystery.