For many years my car was my home from home and office, for anything up to 12 hours a day. (When I was out 'on the road' as a sales rep and later a 'surveyor' ... of sorts).

Full suvival kit carried for both me and the car, later mobile phones, satnav, TV, etc.

One thing I used to do in my car was smoke (except when my son was present).

Thankfully I no longer have a car to worry about, and I don't smoke.

I do however strap my satnav to my pushbike... and still carry the survival kits for the both of us.