I can't tell you how many tanks and batteries I've destroyed getting out of the car with one in my lap. I've even busted a tank at the movie theater. It was horrible. So I designed this. It attaches your ecig to a badge reel available from any office products store. Don't get a cheap one; spend a few bucks and get one with a stout spring.
PROTIP: clip the reel to something in the car when driving to keep these stupid things from slipping in to the cracks.
ADD: I'll be sampling several batteries, tanks and configurations, and adding other sizes to this same thing as I get them done.
Version 2(!!!): made it prettier and with a wider space for the reel strap. also makes this one a good anti-rolling stand.