For short trips, usually a Nestico. They are a 4 X 38 'junior' cigar from the Reserva Organica line. Perfect for a 30 min drive.
Once, on a trip back from OH to MI, I smoked an Alcazar #1, a giant 8 X 50 log of a stogie. It was GOOD!
Lit that thing up right as I crossed from Ohio into Indiana, tossed the nub on the ground as I walked up to my front door in southwest Michigan.
