While I have a cocktail shaking machine already, I never use it. It is nowhere near awesome enough to overcome the fact that using it is more work you save.
But this baby, I’d use. I’d have to build an extension to my back bar, but it would be totally worth it.
Incidentally, if you haven’t clicked the video, it is actually a lot better shaker than it looks. When you shake, just bouncing the shaker straight up and down doesn’t do a very good job and if you are doing it by hand makes you look like a colleague of Conan’s bear. On initial inspection, it looks like this shaker just goes up and down, but it is much more elegant and stylish than that.
All it needs is a quick-release and insertion mechanism and you could build a steampunk-themed classic cocktail bar around it. People would come.