I messed up and couldn't post a pic from my tablet earlier...so I will now. Thing is...while many of the suggestions here were good...I even have some of them!...the 3.7 Gripper from MV is probably the best for stealth, and the quality is peerless in it's class. The keyring and Zippo ones are nice, but the battery life is going to be pretty sketchy. The Gripper takes a 18350 (or 16340) and will last for hours ...as much mAh as you put in there. With a XL cartomizer in there the only thing that sticks out is the drip tip. With the others, the atomizer/clearo/carto all add length.
