I was at an outdoors venue this weekend, drinking some beer, enjoying the concert, and vaping openly on my Ego-T (plenty of analog smokers were out and about, so vaping wasn't an "ask the manager" type of issue), and this dude taps my shoulder and asks if he can bum a smoke. I flashed my stainless steel rig and said "Sorry dude, it's an E-cig". He got this baffled expression on his face and responded "Oh, it's a pen!" and wandered away before I could correct his misconception. Me and my buddies got a good laugh out of that one.