Those crazy Danes!
From this video I have surmised two things. People in Denmark drink a lot of beer, and they have a lot of time on their hands.
This video has everything it takes to go viral. There’s beer. There’s dominoes. There’s the funny set-up at the end and then there’s the sheer amount of time this must have taken to put together. It still has fewer than 100,000 hits, though, which shows what I know.
Despite what YouTube might teach you, the best thing to do with bottles is recycle them. You don’t even have to wash them out.
As for bottle caps, there are many useful things you can do with those. You can turn them into fishing lures, coasters or crochet a trivet for one and turn it into a magnet.