As some people may be aware, you will be required to carry DIY breathalysers if you go driving in france. I will need to get some sometime, but does anyone know what kind of shelf life these things have? And is it on the order of months, years or even decades?
If you buy good quality breathalysers the useful life will be in the order of several years - perhaps up to ten years.
Make sure you get one that carried the 'NF approved' logo,or it will not be legal in France, and you will be liable to a fine. As far as I'm aware there are only two manufacturers currently approved for disposable kits - a French company called Contralco and a South African firm called Redline.
You'll find other makes which are marked 'suitable for use in France' but unless they carry a blue 'NF approved' logo they are no good.
They show a good sense of humour on the link from Nontek.
The compulsory carrying of breathalysers seems to be a defeatist attitude to drink driving. i.e. We can't stop it so we'll make them check them selves (dream on), rather than, if you get caught you get the book thrown at you, so don't.
I find it much simpler to work on a zero tolerance policy. If I drink I don't drive, if I drive I don't drink. Only the one simples thought process is involved then.