It's not available to the public yet, but working models have been produced and the thing won a prize at some design fair. Just because you can't have one doesn't mean it doesn't exist. The reason that it's on Kickstarter isn't because they have an idea they want to develop, it's so that they can produce injection molds in order to sell the thing at a reasonable price.

smoking inside private cars is already banned in the UK if there are children in the car. It's still in the early stages of the police not enforcing it becuase knowledge of the ban isn't very widespread, but it's getting there.

Dutch police ARE using... Dutch police is plural, so bad grammar there. Also, what is smugling? Any why do they want to prevent it?