I have to admit that the One Shot isn’t a device that I have never seen before. It is essentially a bike that can fold up for portability. Even in the eighties, I have seen a bike that can fold into a suitcase.
The One Shot can fold up into something that looks like a golf cart, minus the clubs. You can drag it as you ride, and it is easy to travel on the bus. Of course, if you have a bike, why are you riding the bus?
Now, this is a still a concept product. I don’t see a reason why someone couldn’t make it.